diff --git a/bin/ruby-build b/bin/ruby-build
index 4dd9d719..60053325 100755
--- a/bin/ruby-build
+++ b/bin/ruby-build
@@ -11,7 +11,7 @@
 #   --definitions    List all built-in definitions
 #
 
-RUBY_BUILD_VERSION="20150818"
+RUBY_BUILD_VERSION="20150928"
 
 set -E
 exec 3<&2 # preserve original stderr at fd 3