diff --git a/version.h b/version.h
index f00421ae15..6727b1e7f0 100644
--- a/version.h
+++ b/version.h
@@ -6,7 +6,7 @@
 
 #define RUBY_RELEASE_YEAR 2019
 #define RUBY_RELEASE_MONTH 5
-#define RUBY_RELEASE_DAY 17
+#define RUBY_RELEASE_DAY 18
 
 #include "ruby/version.h"