diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 691ce2a1..7fb7251c 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: DeterminateSystems/nix-installer-action@v17
       - name: Check flake lockfile
-        uses: DeterminateSystems/flake-checker-action@v9
+        uses: DeterminateSystems/flake-checker-action@v12
       - name: Check flake outputs
         run: |
           nix flake check --impure --accept-flake-config --keep-going