diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3feb172e..9a9c5ad6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+## [4.2.0] - 2016-4-10 ##
+### Added
+- #148: Set api_key to empty string 
+- This makes creating an API key for a SendGrid subuser who does not have an API key easier. See #146 for details
+- Thanks to [Adam Beck](https://github.com/Gwash3189) for the pull request!
+
 ## [4.1.1] - 2016-4-6 ##
 ### Fixed
 - #115 #134: Fix typos in initialize methods
diff --git a/README.md b/README.md
index 674285bc..11443171 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ We appreciate your continued support, thank you!
 
 ## Prerequisites
 
-- Ruby version 2.1+
+- Ruby version 2.2+
 - The SendGrid service, starting at the [free level](https://sendgrid.com/free?source=sendgrid-ruby)
 
 ## Setup Environment Variables
diff --git a/lib/sendgrid/version.rb b/lib/sendgrid/version.rb
index 22b54d34..4b4357b9 100644
--- a/lib/sendgrid/version.rb
+++ b/lib/sendgrid/version.rb
@@ -1,3 +1,3 @@
 module SendGrid
-  VERSION = '4.1.1'
+  VERSION = '4.2.0'
 end
\ No newline at end of file
diff --git a/test/sendgrid/test_sendgrid-ruby.rb b/test/sendgrid/test_sendgrid-ruby.rb
index bd451507..6f7d63df 100644
--- a/test/sendgrid/test_sendgrid-ruby.rb
+++ b/test/sendgrid/test_sendgrid-ruby.rb
@@ -55,7 +55,7 @@ def test_init
             ')
         assert_equal(test_headers, sg.request_headers)
         assert_equal("v3", sg.version)
-        assert_equal("4.1.1", SendGrid::VERSION)
+        assert_equal("4.2.0", SendGrid::VERSION)
         assert_instance_of(SendGrid::Client, sg.client)
     end