diff --git a/version.h b/version.h
index cb6cd8ae3c..48431e4b56 100644
--- a/version.h
+++ b/version.h
@@ -14,9 +14,9 @@
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
 #define RUBY_PATCHLEVEL -1
 
-#define RUBY_RELEASE_YEAR 2020
-#define RUBY_RELEASE_MONTH 12
-#define RUBY_RELEASE_DAY 31
+#define RUBY_RELEASE_YEAR 2021
+#define RUBY_RELEASE_MONTH 1
+#define RUBY_RELEASE_DAY 1
 
 #include "ruby/version.h"