diff --git a/CHANGELOG.md b/CHANGELOG.md
index 977add0b..2fb352c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## Version History
 
+#### 20130518
+* Added a definition for JRuby 1.7.4
+
 #### 20130514
 * Added a definition for Ruby 2.0.0-p195
 * Added a definition for Ruby 1.9.3-p429
@@ -14,7 +17,6 @@
 * Default RBENV_VERSION to the globally-specified Ruby
 
 #### 20130408
-* Added a definition for jruby-1.7.4-dev
 * Added a definition for mruby-dev
 * Added a definition for topaz-dev :gem:
 * List matching definitions on ambiguous version specification
diff --git a/bin/ruby-build b/bin/ruby-build
index 28b371f6..b5c01d93 100755
--- a/bin/ruby-build
+++ b/bin/ruby-build
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-RUBY_BUILD_VERSION="20130514"
+RUBY_BUILD_VERSION="20130518"
 
 set -E
 exec 3<&2 # preserve original stderr at fd 3