diff --git a/CHANGELOG.md b/CHANGELOG.md
index 99ec433d..14678fb5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## Version History
 
+#### 20130907
+* Revert using mirror site
+
 #### 20130901
 * Use www.dnsbalance.ring.gr.jp
 * Do not set the Rubinius gems directory to the prefix
diff --git a/bin/ruby-build b/bin/ruby-build
index 5973df0b..c5e2020a 100755
--- a/bin/ruby-build
+++ b/bin/ruby-build
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-RUBY_BUILD_VERSION="20130901"
+RUBY_BUILD_VERSION="20130907"
 
 set -E
 exec 3<&2 # preserve original stderr at fd 3