diff --git a/version.h b/version.h
index 473e1ae09f..179cda8e87 100644
--- a/version.h
+++ b/version.h
@@ -1,11 +1,11 @@
 #define RUBY_VERSION "2.1.0"
-#define RUBY_RELEASE_DATE "2013-09-19"
+#define RUBY_RELEASE_DATE "2013-09-20"
 #define RUBY_PATCHLEVEL -1
 #define RUBY_BRANCH_NAME "trunk"
 
 #define RUBY_RELEASE_YEAR 2013
 #define RUBY_RELEASE_MONTH 9
-#define RUBY_RELEASE_DAY 19
+#define RUBY_RELEASE_DAY 20
 
 #include "ruby/version.h"