diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index 9e2367661..7f8ca2a0d 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: cachix/install-nix-action@0b0e072294b088b73964f1d72dfdac0951439dbd # v31
+      - uses: cachix/install-nix-action@4e002c8ec80594ecd40e759629461e26c8abed15 # v31
 
       - uses: DeterminateSystems/update-flake-lock@v28
         with: