diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index 11f833aaf..8f456176a 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v5
-      - uses: cachix/install-nix-action@a809471b5c7c913aa67bec8f459a11a0decc3fce # v31
+      - uses: cachix/install-nix-action@9280e7aca88deada44c930f1e2c78e21c3ae3edd # v31
 
       - uses: DeterminateSystems/update-flake-lock@v27
         with: