diff --git a/.gitignore b/.gitignore
index f5ae591..01e3dda 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,4 @@ ruby-rev415a3ef9ab82c65a7abc-ext_tk.tar.gz
 /ruby-1.9.3-p362.tar.gz
 /ruby-1.9.3-p374.tar.gz
 /ruby-1.9.3-p385.tar.gz
+/ruby-2.0.0-r39387.tar.gz
diff --git a/ruby-2.0.0-ext-bigdecimal-bigdecimal.gemspec-bump-to-1.2.0.patch b/ruby-2.0.0-ext-bigdecimal-bigdecimal.gemspec-bump-to-1.2.0.patch
new file mode 100644
index 0000000..15a8edf
--- /dev/null
+++ b/ruby-2.0.0-ext-bigdecimal-bigdecimal.gemspec-bump-to-1.2.0.patch
@@ -0,0 +1,31 @@
+From c42cf83f26309b0cba46917f79d20d680e667054 Mon Sep 17 00:00:00 2001
+From: mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
+Date: Tue, 19 Feb 2013 11:50:48 +0000
+Subject: [PATCH] * ext/bigdecimal/bigdecimal.gemspec: bump to 1.2.0.  
+ [ruby-core:51777] [Bug #7761]
+
+git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39321 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
+---
+ ext/bigdecimal/bigdecimal.gemspec | 4 ++--
+ 1 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/ext/bigdecimal/bigdecimal.gemspec b/ext/bigdecimal/bigdecimal.gemspec
+index 362808c..4240f82 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"
+-- 
+1.8.1.2
+
diff --git a/sources b/sources
index 2c2210c..e9ec93d 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-3e0d7f8512400c1a6732327728a56f1d  ruby-1.9.3-p385.tar.gz
+6e9c4c75894dfebd5bf3b75989237662  ruby-2.0.0-r39387.tar.gz