diff --git a/.github/workflows/update-deps.yml b/.github/workflows/update-deps.yml
index 3a0e01aa7..0bf157fce 100644
--- a/.github/workflows/update-deps.yml
+++ b/.github/workflows/update-deps.yml
@@ -20,7 +20,7 @@ jobs:
       pull-requests: write
     strategy:
       matrix:
-        branch: [master, 3.24.x, 3.21.x]
+        branch: [master, 3.24.x]
     steps:
       - name: Checks-out repository
         uses: actions/checkout@v4