diff --git a/version.h b/version.h
index e70d6b1413..eb52bd56db 100644
--- a/version.h
+++ b/version.h
@@ -1,11 +1,11 @@
 #define RUBY_VERSION "1.9.3"
-#define RUBY_RELEASE_DATE "2011-05-20"
+#define RUBY_RELEASE_DATE "2011-05-21"
 #define RUBY_PATCHLEVEL -1
 #define RUBY_BRANCH_NAME "trunk"
 
 #define RUBY_RELEASE_YEAR 2011
 #define RUBY_RELEASE_MONTH 5
-#define RUBY_RELEASE_DAY 20
+#define RUBY_RELEASE_DAY 21
 
 #include "ruby/version.h"