diff --git a/version.h b/version.h
index 18e3f3106f..a556ad76d6 100644
--- a/version.h
+++ b/version.h
@@ -16,7 +16,7 @@
 
 #define RUBY_RELEASE_YEAR 2021
 #define RUBY_RELEASE_MONTH 4
-#define RUBY_RELEASE_DAY 13
+#define RUBY_RELEASE_DAY 15
 
 #include "ruby/version.h"