diff --git a/version.h b/version.h
index 780e7c6aa3..3653b8a01c 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 18
+#define RUBY_RELEASE_DAY 19
 
 #include "ruby/version.h"