diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 756b06e..6eb117f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -5,7 +5,7 @@ name: Release
 
 on:
   push:
-    branches: [ "master" ]
+    branches: [ "master", "1.21.x" ]
 
 permissions:
   contents: read