diff --git a/CHANGELOG.md b/CHANGELOG.md
index c89211923..ba7fa72f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 This project uses [Semantic Versioning 2.0.0](http://semver.org/).
 
 
-## main
+## Release 5.1.1
 
 ### Changed
 
diff --git a/lib/whois/version.rb b/lib/whois/version.rb
index 58ab7bbfc..f9d3c2508 100644
--- a/lib/whois/version.rb
+++ b/lib/whois/version.rb
@@ -11,5 +11,5 @@
 
 module Whois
   # The current library version.
-  VERSION = "5.1.0"
+  VERSION = "5.1.1"
 end