diff --git a/version.h b/version.h
index 4455a30939..99c4e65743 100644
--- a/version.h
+++ b/version.h
@@ -16,7 +16,7 @@
 
 #define RUBY_RELEASE_YEAR 2021
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 5
+#define RUBY_RELEASE_DAY 6
 
 #include "ruby/version.h"