diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 2b1c0c9d..e743b53c 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@v13
       - name: Check flake lockfile
-        uses: DeterminateSystems/flake-checker-action@v8
+        uses: DeterminateSystems/flake-checker-action@v9
       - name: Check flake outputs
         run: |
           nix flake check --impure --accept-flake-config --keep-going