diff --git a/ext/json/lib/json/version.rb b/ext/json/lib/json/version.rb
index 5c24d0c514d..e8483db94bd 100644
--- a/ext/json/lib/json/version.rb
+++ b/ext/json/lib/json/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module JSON
-  VERSION = '2.21.0'
+  VERSION = '2.21.1'
 end