diff --git a/.github/workflows/flake-updates.yml b/.github/workflows/flake-updates.yml
index 7f95db6..8984c7e 100644
--- a/.github/workflows/flake-updates.yml
+++ b/.github/workflows/flake-updates.yml
@@ -14,4 +14,4 @@ jobs:
           extra_nix_config: |
             experimental-features = nix-command flakes
       - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@v20
+        uses: DeterminateSystems/update-flake-lock@v21