diff --git a/version.h b/version.h
index f97a60a149..507c0892de 100644
--- a/version.h
+++ b/version.h
@@ -4,7 +4,7 @@
 
 #define RUBY_RELEASE_YEAR 2018
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 21
+#define RUBY_RELEASE_DAY 22
 
 #include "ruby/version.h"