diff --git a/version.h b/version.h
index 5c9c2f9b1a..ff5e46e3ce 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 16
+#define RUBY_RELEASE_DAY 17
 
 #include "ruby/version.h"