diff --git a/version.h b/version.h
index 4f4911d7b4..24cb76d676 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.3.0"
-#define RUBY_RELEASE_DATE "2015-12-17"
+#define RUBY_RELEASE_DATE "2015-12-18"
 #define RUBY_PATCHLEVEL -1
 
 #define RUBY_RELEASE_YEAR 2015
 #define RUBY_RELEASE_MONTH 12
-#define RUBY_RELEASE_DAY 17
+#define RUBY_RELEASE_DAY 18
 
 #include "ruby/version.h"