diff --git a/CHANGELOG.ja.rdoc b/CHANGELOG.ja.rdoc
index 713b978cb1..a24a006baa 100644
--- a/CHANGELOG.ja.rdoc
+++ b/CHANGELOG.ja.rdoc
@@ -1,5 +1,5 @@
 
-=== 1.5.9 / unreleased
+=== 1.5.9 / 2013年03月21日
 
 * Bugfixes
 
diff --git a/CHANGELOG.rdoc b/CHANGELOG.rdoc
index 2e45e880c2..75e4ab5012 100644
--- a/CHANGELOG.rdoc
+++ b/CHANGELOG.rdoc
@@ -1,5 +1,5 @@
 
-=== 1.5.9 / unreleased
+=== 1.5.9 / 2013-03-21
 
 * Bugfixes
 
diff --git a/lib/nokogiri/version.rb b/lib/nokogiri/version.rb
index 251ab4325d..6450f0ffe9 100644
--- a/lib/nokogiri/version.rb
+++ b/lib/nokogiri/version.rb
@@ -1,6 +1,6 @@
 module Nokogiri
   # The version of Nokogiri you are using
-  VERSION = '1.5.8'
+  VERSION = '1.5.9'
 
   class VersionInfo # :nodoc:
     def jruby?