diff --git a/version.h b/version.h
index 5f02db4d0a..6aea0acf5f 100644
--- a/version.h
+++ b/version.h
@@ -16,7 +16,7 @@
 
 #define RUBY_RELEASE_YEAR 2021
 #define RUBY_RELEASE_MONTH 8
-#define RUBY_RELEASE_DAY 27
+#define RUBY_RELEASE_DAY 28
 
 #include "ruby/version.h"