diff --git a/.github/workflows/update-flake-lock.yml b/.github/workflows/update-flake-lock.yml
index eb7dcde..f35146f 100644
--- a/.github/workflows/update-flake-lock.yml
+++ b/.github/workflows/update-flake-lock.yml
@@ -22,7 +22,7 @@ jobs:
           ssh-private-key: ${{ secrets.MENTION_SSH_KEY  }}
 
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v20
+        uses: DeterminateSystems/update-flake-lock@v21
         with:
           pr-title: "Update flake.lock"
           commit-msg: "chore(flake): update lock"