diff --git a/version.h b/version.h
index ec87268b71..b9fa8e0108 100644
--- a/version.h
+++ b/version.h
@@ -4,7 +4,7 @@
 
 #define RUBY_RELEASE_YEAR 2017
 #define RUBY_RELEASE_MONTH 9
-#define RUBY_RELEASE_DAY 27
+#define RUBY_RELEASE_DAY 28
 
 #include "ruby/version.h"