diff --git a/README.md b/README.md
index 4bb34887a..283ca13c2 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ interactively showing users what options and subcommands are available.
 ![Picocli Demo help message with ANSI colors](docs/images/picocli.Demo.png?raw=true)
 
 #### Releases
-* [Releases](https://github.com/remkop/picocli/releases) - latest: 2.2
+* [Releases](https://github.com/remkop/picocli/releases) - latest: 2.2.1
 * [Picocli 2.0 Release Notes](https://github.com/remkop/picocli/releases/tag/v2.0.0) - note there are some [potential breaking changes](https://github.com/remkop/picocli/releases/tag/v2.0.0#2.0-breaking-changes) from prior versions
 
 #### Documentation
diff --git a/build.gradle b/build.gradle
index 2dbbb50ec..e6f2457be 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,11 +1,11 @@
 group 'info.picocli'
 description 'Annotation-based Java command line parser. Usage help with ANSI styles and colors. Autocomplete. Nested subcommands. Easily included as source to avoid adding a dependency.'
-version '2.2.1-SNAPSHOT'
+version '2.2.1'
 
 // for bumpVersion task
-def oldVersion = '2\\.2\\.0'
+def oldVersion = '2\\.2\\.1-SNAPSHOT'
 def oldRevdate = '2017\\-12\\-21'
-def revDate    = '2017-12-21'
+def revDate    = '2018-01-03'
 
 buildscript {
     repositories {
@@ -82,7 +82,10 @@ apply plugin: 'maven-publish'
 
 jar {
     manifest {
-        attributes 'Implementation-Title'  : 'picocli',
+        attributes 'Specification-Title'   : 'picocli',
+                   'Specification-Vendor'  : 'Remko Popma',
+                   'Specification-Version' : version,
+                   'Implementation-Title'  : 'picocli',
                    'Implementation-Vendor' : 'Remko Popma',
                    'Implementation-Version': version,
                    'Main-Class'            : 'picocli.AutoComplete',
diff --git a/docs/apidocs/allclasses-frame.html b/docs/apidocs/allclasses-frame.html
index e9721e236..d057bd509 100644
--- a/docs/apidocs/allclasses-frame.html
+++ b/docs/apidocs/allclasses-frame.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>All Classes (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>All Classes (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
diff --git a/docs/apidocs/allclasses-noframe.html b/docs/apidocs/allclasses-noframe.html
index 0b4c488d0..42e96fd71 100644
--- a/docs/apidocs/allclasses-noframe.html
+++ b/docs/apidocs/allclasses-noframe.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>All Classes (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>All Classes (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
diff --git a/docs/apidocs/constant-values.html b/docs/apidocs/constant-values.html
index 8cecd7ac2..362e17e86 100644
--- a/docs/apidocs/constant-values.html
+++ b/docs/apidocs/constant-values.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>Constant Field Values (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>Constant Field Values (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="Constant Field Values (picocli 2.2.0 API)";
+            parent.document.title="Constant Field Values (picocli 2.2.1 API)";
         }
     }
     catch(err) {
@@ -94,7 +94,7 @@ <h2 title="picocli">picocli.*</h2>
 <!--   -->
 </a><code>public&nbsp;static&nbsp;final&nbsp;java.lang.String</code></td>
 <td><code><a href="picocli/CommandLine.html#VERSION">VERSION</a></code></td>
-<td class="colLast"><code>"2.2.0"</code></td>
+<td class="colLast"><code>"2.2.1"</code></td>
 </tr>
 </tbody>
 </table>
diff --git a/docs/apidocs/deprecated-list.html b/docs/apidocs/deprecated-list.html
index 0a2348823..b0e40bef4 100644
--- a/docs/apidocs/deprecated-list.html
+++ b/docs/apidocs/deprecated-list.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>Deprecated List (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>Deprecated List (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="Deprecated List (picocli 2.2.0 API)";
+            parent.document.title="Deprecated List (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/help-doc.html b/docs/apidocs/help-doc.html
index ea1489df9..0f1270bad 100644
--- a/docs/apidocs/help-doc.html
+++ b/docs/apidocs/help-doc.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>API Help (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>API Help (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="API Help (picocli 2.2.0 API)";
+            parent.document.title="API Help (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/index-all.html b/docs/apidocs/index-all.html
index fbf17c245..c37007186 100644
--- a/docs/apidocs/index-all.html
+++ b/docs/apidocs/index-all.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>Index (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>Index (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="Index (picocli 2.2.0 API)";
+            parent.document.title="Index (picocli 2.2.1 API)";
         }
     }
     catch(err) {
@@ -1403,7 +1403,7 @@ <h2 class="title">V</h2>
 </dd>
 <dt><span class="memberNameLink"><a href="picocli/CommandLine.html#VERSION">VERSION</a></span> - Static variable in class picocli.<a href="picocli/CommandLine.html" title="class in picocli">CommandLine</a></dt>
 <dd>
-<div class="block">This is picocli version "2.2.0".</div>
+<div class="block">This is picocli version "2.2.1".</div>
 </dd>
 <dt><span class="memberNameLink"><a href="picocli/groovy/PicocliScriptASTTransformation.html#visit-org.codehaus.groovy.ast.ASTNode:A-org.codehaus.groovy.control.SourceUnit-">visit(ASTNode[], SourceUnit)</a></span> - Method in class picocli.groovy.<a href="picocli/groovy/PicocliScriptASTTransformation.html" title="class in picocli.groovy">PicocliScriptASTTransformation</a></dt>
 <dd>&nbsp;</dd>
diff --git a/docs/apidocs/index.html b/docs/apidocs/index.html
index 10cefb7f2..d2edfeb51 100644
--- a/docs/apidocs/index.html
+++ b/docs/apidocs/index.html
@@ -2,8 +2,8 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>picocli 2.2.0 API</title>
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>picocli 2.2.1 API</title>
 <script type="text/javascript">
     tmpTargetPage = "" + window.location.search;
     if (tmpTargetPage != "" && tmpTargetPage != "undefined")
diff --git a/docs/apidocs/overview-frame.html b/docs/apidocs/overview-frame.html
index 70f9d22a4..75daf8293 100644
--- a/docs/apidocs/overview-frame.html
+++ b/docs/apidocs/overview-frame.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>Overview List (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>Overview List (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
diff --git a/docs/apidocs/overview-summary.html b/docs/apidocs/overview-summary.html
index 23baaccc3..1ccad19db 100644
--- a/docs/apidocs/overview-summary.html
+++ b/docs/apidocs/overview-summary.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>Overview (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>Overview (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="Overview (picocli 2.2.0 API)";
+            parent.document.title="Overview (picocli 2.2.1 API)";
         }
     }
     catch(err) {
@@ -69,7 +69,7 @@
 </a></div>
 <!-- ========= END OF TOP NAVBAR ========= -->
 <div class="header">
-<h1 class="title">picocli 2.2.0 API</h1>
+<h1 class="title">picocli 2.2.1 API</h1>
 </div>
 <div class="header">
 <div class="subTitle">
diff --git a/docs/apidocs/overview-tree.html b/docs/apidocs/overview-tree.html
index 51c2b8e4e..de7a37c80 100644
--- a/docs/apidocs/overview-tree.html
+++ b/docs/apidocs/overview-tree.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>Class Hierarchy (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>Class Hierarchy (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="Class Hierarchy (picocli 2.2.0 API)";
+            parent.document.title="Class Hierarchy (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/AutoComplete.html b/docs/apidocs/picocli/AutoComplete.html
index d85f94dfc..62ae70a60 100644
--- a/docs/apidocs/picocli/AutoComplete.html
+++ b/docs/apidocs/picocli/AutoComplete.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:14 JST 2017 -->
-<title>AutoComplete (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:36 JST 2018 -->
+<title>AutoComplete (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="AutoComplete (picocli 2.2.0 API)";
+            parent.document.title="AutoComplete (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/CommandLine.Command.html b/docs/apidocs/picocli/CommandLine.Command.html
index a51793ff1..b78d8afc3 100644
--- a/docs/apidocs/picocli/CommandLine.Command.html
+++ b/docs/apidocs/picocli/CommandLine.Command.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:14 JST 2017 -->
-<title>CommandLine.Command (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:36 JST 2018 -->
+<title>CommandLine.Command (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="CommandLine.Command (picocli 2.2.0 API)";
+            parent.document.title="CommandLine.Command (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/CommandLine.DefaultExceptionHandler.html b/docs/apidocs/picocli/CommandLine.DefaultExceptionHandler.html
index d98682412..fd2d8e969 100644
--- a/docs/apidocs/picocli/CommandLine.DefaultExceptionHandler.html
+++ b/docs/apidocs/picocli/CommandLine.DefaultExceptionHandler.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:14 JST 2017 -->
-<title>CommandLine.DefaultExceptionHandler (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:36 JST 2018 -->
+<title>CommandLine.DefaultExceptionHandler (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="CommandLine.DefaultExceptionHandler (picocli 2.2.0 API)";
+            parent.document.title="CommandLine.DefaultExceptionHandler (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/CommandLine.DuplicateOptionAnnotationsException.html b/docs/apidocs/picocli/CommandLine.DuplicateOptionAnnotationsException.html
index 0cdaaf21e..167f8e9e3 100644
--- a/docs/apidocs/picocli/CommandLine.DuplicateOptionAnnotationsException.html
+++ b/docs/apidocs/picocli/CommandLine.DuplicateOptionAnnotationsException.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:14 JST 2017 -->
-<title>CommandLine.DuplicateOptionAnnotationsException (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:36 JST 2018 -->
+<title>CommandLine.DuplicateOptionAnnotationsException (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="CommandLine.DuplicateOptionAnnotationsException (picocli 2.2.0 API)";
+            parent.document.title="CommandLine.DuplicateOptionAnnotationsException (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/CommandLine.ExecutionException.html b/docs/apidocs/picocli/CommandLine.ExecutionException.html
index 50008c7ee..b54bcb52b 100644
--- a/docs/apidocs/picocli/CommandLine.ExecutionException.html
+++ b/docs/apidocs/picocli/CommandLine.ExecutionException.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:14 JST 2017 -->
-<title>CommandLine.ExecutionException (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:36 JST 2018 -->
+<title>CommandLine.ExecutionException (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="CommandLine.ExecutionException (picocli 2.2.0 API)";
+            parent.document.title="CommandLine.ExecutionException (picocli 2.2.1 API)";
         }
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     catch(err) {
diff --git a/docs/apidocs/picocli/CommandLine.Help.Ansi.IStyle.html b/docs/apidocs/picocli/CommandLine.Help.Ansi.IStyle.html
index 56a4dff6b..27a4dab56 100644
--- a/docs/apidocs/picocli/CommandLine.Help.Ansi.IStyle.html
+++ b/docs/apidocs/picocli/CommandLine.Help.Ansi.IStyle.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:15 JST 2017 -->
-<title>CommandLine.Help.Ansi.IStyle (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:36 JST 2018 -->
+<title>CommandLine.Help.Ansi.IStyle (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="CommandLine.Help.Ansi.IStyle (picocli 2.2.0 API)";
+            parent.document.title="CommandLine.Help.Ansi.IStyle (picocli 2.2.1 API)";
         }
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     catch(err) {
diff --git a/docs/apidocs/picocli/CommandLine.Help.Ansi.Style.html b/docs/apidocs/picocli/CommandLine.Help.Ansi.Style.html
index c1e2201d1..face12265 100644
--- a/docs/apidocs/picocli/CommandLine.Help.Ansi.Style.html
+++ b/docs/apidocs/picocli/CommandLine.Help.Ansi.Style.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:15 JST 2017 -->
-<title>CommandLine.Help.Ansi.Style (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:36 JST 2018 -->
+<title>CommandLine.Help.Ansi.Style (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="CommandLine.Help.Ansi.Style (picocli 2.2.0 API)";
+            parent.document.title="CommandLine.Help.Ansi.Style (picocli 2.2.1 API)";
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diff --git a/docs/apidocs/picocli/CommandLine.Help.Ansi.Text.html b/docs/apidocs/picocli/CommandLine.Help.Ansi.Text.html
index 65bb001a8..dd1f9490c 100644
--- a/docs/apidocs/picocli/CommandLine.Help.Ansi.Text.html
+++ b/docs/apidocs/picocli/CommandLine.Help.Ansi.Text.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:15 JST 2017 -->
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+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>CommandLine.IVersionProvider (picocli 2.2.1 API)</title>
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+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
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+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
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+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
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-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>CommandLine.UnmatchedArgumentException (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
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+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:36 JST 2018 -->
+<title>CommandLine (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
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@@ -381,7 +381,7 @@ <h3>Field Summary</h3>
 <tr class="altColor">
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-<div class="block">This is picocli version "2.2.0".</div>
+<div class="block">This is picocli version "2.2.1".</div>
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-<div class="block">This is picocli version "2.2.0".</div>
+<div class="block">This is picocli version "2.2.1".</div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../constant-values.html#picocli.CommandLine.VERSION">Constant Field Values</a></dd>
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+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>PicocliBaseScript (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
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     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="PicocliBaseScript (picocli 2.2.0 API)";
+            parent.document.title="PicocliBaseScript (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/groovy/PicocliScript.html b/docs/apidocs/picocli/groovy/PicocliScript.html
index aa7136ffc..b5f824daa 100644
--- a/docs/apidocs/picocli/groovy/PicocliScript.html
+++ b/docs/apidocs/picocli/groovy/PicocliScript.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>PicocliScript (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>PicocliScript (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="PicocliScript (picocli 2.2.0 API)";
+            parent.document.title="PicocliScript (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/groovy/PicocliScriptASTTransformation.html b/docs/apidocs/picocli/groovy/PicocliScriptASTTransformation.html
index 90a85623a..73cb4b522 100644
--- a/docs/apidocs/picocli/groovy/PicocliScriptASTTransformation.html
+++ b/docs/apidocs/picocli/groovy/PicocliScriptASTTransformation.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>PicocliScriptASTTransformation (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>PicocliScriptASTTransformation (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="PicocliScriptASTTransformation (picocli 2.2.0 API)";
+            parent.document.title="PicocliScriptASTTransformation (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/groovy/package-frame.html b/docs/apidocs/picocli/groovy/package-frame.html
index 8dd0aeaa5..f6b4c8eeb 100644
--- a/docs/apidocs/picocli/groovy/package-frame.html
+++ b/docs/apidocs/picocli/groovy/package-frame.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>picocli.groovy (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>picocli.groovy (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
diff --git a/docs/apidocs/picocli/groovy/package-summary.html b/docs/apidocs/picocli/groovy/package-summary.html
index eab6370bb..f61ed3f1d 100644
--- a/docs/apidocs/picocli/groovy/package-summary.html
+++ b/docs/apidocs/picocli/groovy/package-summary.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>picocli.groovy (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>picocli.groovy (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="picocli.groovy (picocli 2.2.0 API)";
+            parent.document.title="picocli.groovy (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/groovy/package-tree.html b/docs/apidocs/picocli/groovy/package-tree.html
index f599d0272..96edbcd51 100644
--- a/docs/apidocs/picocli/groovy/package-tree.html
+++ b/docs/apidocs/picocli/groovy/package-tree.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>picocli.groovy Class Hierarchy (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>picocli.groovy Class Hierarchy (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../../stylesheet.css" title="Style">
 <script type="text/javascript" src="../../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="picocli.groovy Class Hierarchy (picocli 2.2.0 API)";
+            parent.document.title="picocli.groovy Class Hierarchy (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/package-frame.html b/docs/apidocs/picocli/package-frame.html
index 9bc292cbf..e18acb5a0 100644
--- a/docs/apidocs/picocli/package-frame.html
+++ b/docs/apidocs/picocli/package-frame.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>picocli (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>picocli (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
diff --git a/docs/apidocs/picocli/package-summary.html b/docs/apidocs/picocli/package-summary.html
index 33c5bfb28..9e7e12479 100644
--- a/docs/apidocs/picocli/package-summary.html
+++ b/docs/apidocs/picocli/package-summary.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>picocli (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>picocli (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="picocli (picocli 2.2.0 API)";
+            parent.document.title="picocli (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/apidocs/picocli/package-tree.html b/docs/apidocs/picocli/package-tree.html
index 8cd4fab84..a88a364b6 100644
--- a/docs/apidocs/picocli/package-tree.html
+++ b/docs/apidocs/picocli/package-tree.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>picocli Class Hierarchy (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>picocli Class Hierarchy (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style">
 <script type="text/javascript" src="../script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="picocli Class Hierarchy (picocli 2.2.0 API)";
+            parent.document.title="picocli Class Hierarchy (picocli 2.2.1 API)";
         }
     }
     catch(err) {
@@ -144,10 +144,10 @@ <h2 title="Interface Hierarchy">Interface Hierarchy</h2>
 </ul>
 <h2 title="Annotation Type Hierarchy">Annotation Type Hierarchy</h2>
 <ul>
-<li type="circle">picocli.<a href="../picocli/CommandLine.ParentCommand.html" title="annotation in picocli"><span class="typeNameLink">CommandLine.ParentCommand</span></a> (implements java.lang.annotation.Annotation)</li>
 <li type="circle">picocli.<a href="../picocli/CommandLine.Option.html" title="annotation in picocli"><span class="typeNameLink">CommandLine.Option</span></a> (implements java.lang.annotation.Annotation)</li>
-<li type="circle">picocli.<a href="../picocli/CommandLine.Parameters.html" title="annotation in picocli"><span class="typeNameLink">CommandLine.Parameters</span></a> (implements java.lang.annotation.Annotation)</li>
+<li type="circle">picocli.<a href="../picocli/CommandLine.ParentCommand.html" title="annotation in picocli"><span class="typeNameLink">CommandLine.ParentCommand</span></a> (implements java.lang.annotation.Annotation)</li>
 <li type="circle">picocli.<a href="../picocli/CommandLine.Command.html" title="annotation in picocli"><span class="typeNameLink">CommandLine.Command</span></a> (implements java.lang.annotation.Annotation)</li>
+<li type="circle">picocli.<a href="../picocli/CommandLine.Parameters.html" title="annotation in picocli"><span class="typeNameLink">CommandLine.Parameters</span></a> (implements java.lang.annotation.Annotation)</li>
 </ul>
 <h2 title="Enum Hierarchy">Enum Hierarchy</h2>
 <ul>
@@ -155,9 +155,9 @@ <h2 title="Enum Hierarchy">Enum Hierarchy</h2>
 <ul>
 <li type="circle">java.lang.Enum&lt;E&gt; (implements java.lang.Comparable&lt;T&gt;, java.io.Serializable)
 <ul>
-<li type="circle">picocli.<a href="../picocli/CommandLine.Help.Ansi.html" title="enum in picocli"><span class="typeNameLink">CommandLine.Help.Ansi</span></a></li>
 <li type="circle">picocli.<a href="../picocli/CommandLine.Help.Column.Overflow.html" title="enum in picocli"><span class="typeNameLink">CommandLine.Help.Column.Overflow</span></a></li>
 <li type="circle">picocli.<a href="../picocli/CommandLine.Help.Ansi.Style.html" title="enum in picocli"><span class="typeNameLink">CommandLine.Help.Ansi.Style</span></a> (implements picocli.<a href="../picocli/CommandLine.Help.Ansi.IStyle.html" title="interface in picocli">CommandLine.Help.Ansi.IStyle</a>)</li>
+<li type="circle">picocli.<a href="../picocli/CommandLine.Help.Ansi.html" title="enum in picocli"><span class="typeNameLink">CommandLine.Help.Ansi</span></a></li>
 </ul>
 </li>
 </ul>
diff --git a/docs/apidocs/serialized-form.html b/docs/apidocs/serialized-form.html
index d35710503..561c885ac 100644
--- a/docs/apidocs/serialized-form.html
+++ b/docs/apidocs/serialized-form.html
@@ -2,9 +2,9 @@
 <!-- NewPage -->
 <html lang="en">
 <head>
-<!-- Generated by javadoc (1.8.0_131) on Thu Dec 21 21:07:16 JST 2017 -->
-<title>Serialized Form (picocli 2.2.0 API)</title>
-<meta name="date" content="2017-12-21">
+<!-- Generated by javadoc (1.8.0_144) on Wed Jan 03 01:35:37 JST 2018 -->
+<title>Serialized Form (picocli 2.2.1 API)</title>
+<meta name="date" content="2018-01-03">
 <link rel="stylesheet" type="text/css" href="stylesheet.css" title="Style">
 <script type="text/javascript" src="script.js"></script>
 </head>
@@ -12,7 +12,7 @@
 <script type="text/javascript"><!--
     try {
         if (location.href.indexOf('is-external=true') == -1) {
-            parent.document.title="Serialized Form (picocli 2.2.0 API)";
+            parent.document.title="Serialized Form (picocli 2.2.1 API)";
         }
     }
     catch(err) {
diff --git a/docs/autocomplete.adoc b/docs/autocomplete.adoc
index 2c660411b..67409c465 100644
--- a/docs/autocomplete.adoc
+++ b/docs/autocomplete.adoc
@@ -1,8 +1,8 @@
 = Autocomplete for Java Command Line Applications
 //:author: Remko Popma
 //:email: rpopma@apache.org
-:revnumber: 2.2.1-SNAPSHOT
-:revdate: 2017-12-21
+:revnumber: 2.2.1
+:revdate: 2018-01-03
 :toc: left
 :numbered:
 :toclevels: 3
diff --git a/docs/autocomplete.html b/docs/autocomplete.html
index 61d9021ae..9b12b7270 100644
--- a/docs/autocomplete.html
+++ b/docs/autocomplete.html
@@ -513,8 +513,8 @@
 <div id="header">
 <h1>Autocomplete for Java Command Line Applications</h1>
 <div class="details">
-<span id="revnumber">version 2.2.0,</span>
-<span id="revdate">2017-12-21</span>
+<span id="revnumber">version 2.2.1,</span>
+<span id="revdate">2018-01-03</span>
 </div>
 <div id="toc" class="toc2">
 <div id="toctitle">Table of Contents</div>
@@ -1076,8 +1076,8 @@ <h2 id="_releases">12. Releases</h2>
 </div>
 <div id="footer">
 <div id="footer-text">
-Version 2.2.0<br>
-Last updated 2017-12-21 21:04:30 +09:00
+Version 2.2.1<br>
+Last updated 2018-01-03 01:28:05 +09:00
 </div>
 </div>
 </body>
diff --git a/docs/index.adoc b/docs/index.adoc
index 88330c218..210e49c25 100644
--- a/docs/index.adoc
+++ b/docs/index.adoc
@@ -1,8 +1,8 @@
 = picocli - a mighty tiny command line interface
 //:author: Remko Popma
 //:email: rpopma@apache.org
-:revnumber: 2.2.1-SNAPSHOT
-:revdate: 2017-12-21
+:revnumber: 2.2.1
+:revdate: 2018-01-03
 :toc: left
 :numbered:
 :toclevels: 2
@@ -2120,7 +2120,7 @@ The script body is executed if the user input was valid and did not request usag
 
 [source,groovy]
 ----
-@Grab('info.picocli:picocli:2.2.1-SNAPSHOT')
+@Grab('info.picocli:picocli:2.2.1')
 @Command(name = "myCommand",
   description = "@|bold Groovy script|@ @|underline picocli|@ example")
 @picocli.groovy.PicocliScript
@@ -2149,7 +2149,7 @@ CAUTION: When using a Groovy version older than 2.4.7, use this workaround for t
 
 [source,groovy]
 ----
-@Grab('info.picocli:picocli:2.2.1-SNAPSHOT')
+@Grab('info.picocli:picocli:2.2.1')
 @GrabExclude('org.codehaus.groovy:groovy-all') // work around GROOVY-7613
 ...
 ----
@@ -2281,7 +2281,7 @@ See the <<Source,source code>> below. Copy and paste it into a file called `Comm
 
 === Gradle
 ----
-compile 'info.picocli:picocli:2.2.1-SNAPSHOT'
+compile 'info.picocli:picocli:2.2.1'
 ----
 
 === Maven
@@ -2289,19 +2289,19 @@ compile 'info.picocli:picocli:2.2.1-SNAPSHOT'
 <dependency>
   <groupId>info.picocli</groupId>
   <artifactId>picocli</artifactId>
-  <version>2.2.1-SNAPSHOT</version>
+  <version>2.2.1</version>
 </dependency>
 ----
 
 === Scala SBT
 ----
-libraryDependencies += "info.picocli" % "picocli" % "2.2.1-SNAPSHOT"
+libraryDependencies += "info.picocli" % "picocli" % "2.2.1"
 ----
 
 === Ivy
 
 ----
-<dependency org="info.picocli" name="picocli" rev="2.2.1-SNAPSHOT" />
+<dependency org="info.picocli" name="picocli" rev="2.2.1" />
 ----
 
 === Source
diff --git a/docs/index.html b/docs/index.html
index ec579878f..2b01b94c2 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -513,8 +513,8 @@
 <div id="header">
 <h1>picocli - a mighty tiny command line interface</h1>
 <div class="details">
-<span id="revnumber">version 2.2.0,</span>
-<span id="revdate">2017-12-21</span>
+<span id="revnumber">version 2.2.1,</span>
+<span id="revdate">2018-01-03</span>
 </div>
 <div id="toc" class="toc2">
 <div id="toctitle">Features</div>
@@ -3618,7 +3618,7 @@ <h3 id="_groovy">16.1. Groovy</h3>
 </div>
 <div class="listingblock">
 <div class="content">
-<pre class="CodeRay highlight"><code data-lang="groovy"><span class="annotation">@Grab</span>(<span class="string"><span class="delimiter">'</span><span class="content">info.picocli:picocli:2.2.0</span><span class="delimiter">'</span></span>)
+<pre class="CodeRay highlight"><code data-lang="groovy"><span class="annotation">@Grab</span>(<span class="string"><span class="delimiter">'</span><span class="content">info.picocli:picocli:2.2.1</span><span class="delimiter">'</span></span>)
 <span class="annotation">@Command</span>(name = <span class="string"><span class="delimiter">&quot;</span><span class="content">myCommand</span><span class="delimiter">&quot;</span></span>,
   description = <span class="string"><span class="delimiter">&quot;</span><span class="content">@|bold Groovy script|@ @|underline picocli|@ example</span><span class="delimiter">&quot;</span></span>)
 <span class="annotation">@picocli</span>.groovy.PicocliScript
@@ -3657,7 +3657,7 @@ <h3 id="_groovy">16.1. Groovy</h3>
 </div>
 <div class="listingblock">
 <div class="content">
-<pre class="CodeRay highlight"><code data-lang="groovy"><span class="annotation">@Grab</span>(<span class="string"><span class="delimiter">'</span><span class="content">info.picocli:picocli:2.2.0</span><span class="delimiter">'</span></span>)
+<pre class="CodeRay highlight"><code data-lang="groovy"><span class="annotation">@Grab</span>(<span class="string"><span class="delimiter">'</span><span class="content">info.picocli:picocli:2.2.1</span><span class="delimiter">'</span></span>)
 <span class="annotation">@GrabExclude</span>(<span class="string"><span class="delimiter">'</span><span class="content">org.codehaus.groovy:groovy-all</span><span class="delimiter">'</span></span>) <span class="comment">// work around GROOVY-7613</span>
 ...</code></pre>
 </div>
@@ -3666,16 +3666,45 @@ <h3 id="_groovy">16.1. Groovy</h3>
 <div class="sect2">
 <h3 id="_kotlin">16.2. Kotlin</h3>
 <div class="paragraph">
-<p>Kotlin does not allow specifying an array <a href="https://kotlinlang.org/docs/reference/annotations.html">annotation</a>
- attribute as a single value,
-so be aware that you will have to write <code>arrayOf(&#8230;&#8203;)</code> for the <code>names</code>, <code>description</code> and <code>type</code> attributes.</p>
+<p>Kotlin 1.2 (released Nov 28, 2017) officially supports <a href="http://kotlinlang.org/docs/reference/whatsnew12.html#array-literals-in-annotations">array literals in annotations</a>, allowing a more compact notation:</p>
+</div>
+<div class="listingblock">
+<div class="content">
+<pre class="CodeRay highlight"><code data-lang="kotlin">@Command(name = &quot;MyApp&quot;, version = [&quot;Kotlin picocli demo v1.0&quot;],
+        description = [&quot;@|bold Kotlin|@ @|underline picocli|@ example&quot;])
+class MyApp : Runnable {
+
+    @Option(names = [&quot;-c&quot;, &quot;--count&quot;], paramLabel = &quot;COUNT&quot;,
+            description = [&quot;the count&quot;])
+    private val count: Int = 0
+
+    @Option(names = [&quot;-h&quot;, &quot;--help&quot;], usageHelp = true,
+            description = [&quot;print this help and exit&quot;])
+    private val helpRequested: Boolean = false
+
+    @Option(names = [&quot;-V&quot;, &quot;--version&quot;], versionHelp = true,
+            description = [&quot;print version info and exit&quot;])
+    private val versionRequested: Boolean = false
+
+    override fun run() {
+        for (i in 0 until count) {
+            println(&quot;hello world $i...&quot;)
+        }
+    }
+    companion object {
+        @JvmStatic fun main(args: Array&lt;String&gt;) {
+            CommandLine.run(MyApp(), System.err, *args)
+        }
+    }
+}</code></pre>
+</div>
 </div>
 <div class="paragraph">
-<p>(Kotlin <a href="https://blog.jetbrains.com/kotlin/2017/06/early-access-program-for-kotlin-1-2-has-been-started/">1.2 may support</a> array literals like <code>names = ["-h", "--help"]</code> in annotations.)</p>
+<p>Kotlin versions prior to 1.2 did not allow the <a href="https://kotlinlang.org/docs/reference/annotations.html">array literal syntax in annotations</a>, so with older versions of Kotlin you will have to write <code>arrayOf(&#8230;&#8203;)</code> for the <code>names</code>, <code>description</code> and <code>type</code> attributes.</p>
 </div>
 <div class="listingblock">
 <div class="content">
-<pre class="CodeRay highlight"><code data-lang="kotlin">@Command(name = &quot;MyApp&quot;, version = arrayOf(&quot;Kotlin picocli demo v1.0&quot;),
+<pre class="CodeRay highlight"><code data-lang="kotlin">@Command(name = &quot;MyApp&quot;, version = arrayOf(&quot;picocli demo for Kotlin v1.0 and Kotlin v1.1&quot;),
         description = arrayOf(&quot;@|bold Kotlin|@ @|underline picocli|@ example&quot;))
 class MyApp : Runnable {
 
@@ -3800,7 +3829,7 @@ <h2 id="_download">22. Download</h2>
 <h3 id="_gradle">22.1. Gradle</h3>
 <div class="listingblock">
 <div class="content">
-<pre>compile 'info.picocli:picocli:2.2.0'</pre>
+<pre>compile 'info.picocli:picocli:2.2.1'</pre>
 </div>
 </div>
 </div>
@@ -3811,7 +3840,7 @@ <h3 id="_maven">22.2. Maven</h3>
 <pre>&lt;dependency&gt;
   &lt;groupId&gt;info.picocli&lt;/groupId&gt;
   &lt;artifactId&gt;picocli&lt;/artifactId&gt;
-  &lt;version&gt;2.2.0&lt;/version&gt;
+  &lt;version&gt;2.2.1&lt;/version&gt;
 &lt;/dependency&gt;</pre>
 </div>
 </div>
@@ -3820,7 +3849,7 @@ <h3 id="_maven">22.2. Maven</h3>
 <h3 id="_scala_sbt">22.3. Scala SBT</h3>
 <div class="listingblock">
 <div class="content">
-<pre>libraryDependencies += "info.picocli" % "picocli" % "2.2.0"</pre>
+<pre>libraryDependencies += "info.picocli" % "picocli" % "2.2.1"</pre>
 </div>
 </div>
 </div>
@@ -3828,7 +3857,7 @@ <h3 id="_scala_sbt">22.3. Scala SBT</h3>
 <h3 id="_ivy">22.4. Ivy</h3>
 <div class="listingblock">
 <div class="content">
-<pre>&lt;dependency org="info.picocli" name="picocli" rev="2.2.0" /&gt;</pre>
+<pre>&lt;dependency org="info.picocli" name="picocli" rev="2.2.1" /&gt;</pre>
 </div>
 </div>
 </div>
@@ -3980,7 +4009,7 @@ <h3 id="_source">22.5. Source</h3>
  */</span>
 <span class="directive">public</span> <span class="type">class</span> <span class="class">CommandLine</span> {
     <span class="comment">/** This is picocli version {@value}. */</span>
-    <span class="directive">public</span> <span class="directive">static</span> <span class="directive">final</span> <span class="predefined-type">String</span> VERSION = <span class="string"><span class="delimiter">&quot;</span><span class="content">2.2.0</span><span class="delimiter">&quot;</span></span>;
+    <span class="directive">public</span> <span class="directive">static</span> <span class="directive">final</span> <span class="predefined-type">String</span> VERSION = <span class="string"><span class="delimiter">&quot;</span><span class="content">2.2.1</span><span class="delimiter">&quot;</span></span>;
 
     <span class="directive">private</span> <span class="directive">final</span> Tracer tracer = <span class="keyword">new</span> Tracer();
     <span class="directive">private</span> <span class="directive">final</span> Interpreter interpreter;
@@ -7715,7 +7744,7 @@ <h3 id="_source">22.5. Source</h3>
                 Text EMPTY = Ansi.EMPTY_TEXT;
                 <span class="predefined-type">List</span>&lt;Text<span class="type">[]</span>&gt; result = <span class="keyword">new</span> <span class="predefined-type">ArrayList</span>&lt;Text<span class="type">[]</span>&gt;();
                 Text<span class="type">[]</span> descriptionFirstLines = scheme.ansi().new Text(str(option.description(), <span class="integer">0</span>)).splitLines();
-                <span class="keyword">if</span> (descriptionFirstLines.length == <span class="integer">0</span>) {
+                <span class="keyword">if</span> (descriptionFirstLines.length == <span class="integer">0</span> || (descriptionFirstLines.length == <span class="integer">1</span> &amp;&amp; descriptionFirstLines[<span class="integer">0</span>].plain.length() == <span class="integer">0</span>)) {
                     <span class="keyword">if</span> (showDefault) {
                         descriptionFirstLines = <span class="keyword">new</span> Text<span class="type">[]</span>{scheme.ansi().new Text(<span class="string"><span class="delimiter">&quot;</span><span class="content">  Default: </span><span class="delimiter">&quot;</span></span> + defaultValue)};
                         showDefault = <span class="predefined-constant">false</span>; <span class="comment">// don't show the default value twice</span>
@@ -8658,7 +8687,7 @@ <h3 id="_source">22.5. Source</h3>
 
                 <span class="directive">public</span> Text<span class="type">[]</span> splitLines() {
                     <span class="predefined-type">List</span>&lt;Text&gt; result = <span class="keyword">new</span> <span class="predefined-type">ArrayList</span>&lt;Text&gt;();
-                    <span class="type">boolean</span> trailingEmptyString = <span class="predefined-constant">false</span>;
+                    <span class="type">boolean</span> trailingEmptyString = plain.length() == <span class="integer">0</span>;
                     <span class="type">int</span> start = <span class="integer">0</span>, end = <span class="integer">0</span>;
                     <span class="keyword">for</span> (<span class="type">int</span> i = <span class="integer">0</span>; i &lt; plain.length(); i++, end = i) {
                         <span class="type">char</span> c = plain.charAt(i);
@@ -8975,8 +9004,8 @@ <h3 id="_source">22.5. Source</h3>
 </div>
 <div id="footer">
 <div id="footer-text">
-Version 2.2.0<br>
-Last updated 2017-12-21 21:04:30 +09:00
+Version 2.2.1<br>
+Last updated 2018-01-03 01:28:05 +09:00
 </div>
 </div>
 </body>
diff --git a/src/main/java/picocli/CommandLine.java b/src/main/java/picocli/CommandLine.java
index c378b7ab3..cb3c61aeb 100644
--- a/src/main/java/picocli/CommandLine.java
+++ b/src/main/java/picocli/CommandLine.java
@@ -142,7 +142,7 @@
  */
 public class CommandLine {
     /** This is picocli version {@value}. */
-    public static final String VERSION = "2.2.1-SNAPSHOT";
+    public static final String VERSION = "2.2.1";
 
     private final Tracer tracer = new Tracer();
     private final Interpreter interpreter;
diff --git a/src/test/java/picocli/AutoCompleteTest.java b/src/test/java/picocli/AutoCompleteTest.java
index 1b139ca17..8dcba234a 100644
--- a/src/test/java/picocli/AutoCompleteTest.java
+++ b/src/test/java/picocli/AutoCompleteTest.java
@@ -323,7 +323,7 @@ public void testAutoCompleteAppBothScriptFilesForceOverwrite() throws Exception
                 "# =======================\n" +
                 "#\n" +
                 "# Bash completion support for the `picocli.AutoComplete` command,\n" +
-                "# generated by [picocli](http://picocli.info/) version 2.2.1-SNAPSHOT.\n" +
+                "# generated by [picocli](http://picocli.info/) version 2.2.1.\n" +
                 "#\n" +
                 "# Installation\n" +
                 "# ------------\n" +
diff --git a/src/test/java/picocli/CommandLineTest.java b/src/test/java/picocli/CommandLineTest.java
index c8c2f7a65..63e8fc24e 100644
--- a/src/test/java/picocli/CommandLineTest.java
+++ b/src/test/java/picocli/CommandLineTest.java
@@ -146,7 +146,7 @@ public <T> T create(Class<T> cls) throws Exception {
     }
     @Test
     public void testVersion() {
-        assertEquals("2.2.1-SNAPSHOT", CommandLine.VERSION);
+        assertEquals("2.2.1", CommandLine.VERSION);
     }
     @Test
     public void testArrayPositionalParametersAreAppendedNotReplaced() {
