diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index 123028ff2..ce86ff798 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@f0fe604f8a612776892427721526b4c7cfb23aba # v31
+      - uses: cachix/install-nix-action@cebd211ec2008b83bda8fb0b21c3c072f004fe04 # v31
 
       - uses: DeterminateSystems/update-flake-lock@v26
         with: