diff --git a/ChangeLog b/ChangeLog
index 90aca750f7..e6842f10c6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Feb 19 20:50:00 2013  Kenta MURATA  <mrkn@mrkn.jp>
+
+	* ext/bigdecimal/bigdecimal.gemspec: bump to 1.2.0.
+	  [ruby-core:51777] [Bug #7761]
+
 Tue Feb 19 13:07:25 2013  Akinori MUSHA  <knu@iDaemons.org>
 
 	* ext/syslog/syslog.c (Init_syslog): Define inspect as a singleton
diff --git a/ext/bigdecimal/bigdecimal.gemspec b/ext/bigdecimal/bigdecimal.gemspec
index 362808c4e3..4240f827e4 100644
--- a/ext/bigdecimal/bigdecimal.gemspec
+++ b/ext/bigdecimal/bigdecimal.gemspec
@@ -1,10 +1,10 @@
 # -*- ruby -*-
-_VERSION = "1.1.0"
+_VERSION = "1.2.0"
 
 Gem::Specification.new do |s|
   s.name = "bigdecimal"
   s.version = _VERSION
-  s.date = "2011-07-30"
+  s.date = "2012-02-19"
   s.summary = "Arbitrary-precision decimal floating-point number library."
   s.homepage = "http://www.ruby-lang.org"
   s.email = "mrkn@mrkn.jp"