diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index e3d77b804..6e018776d 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: cachix/install-nix-action@4e002c8ec80594ecd40e759629461e26c8abed15 # v31
+      - uses: cachix/install-nix-action@2126ae7fc54c9df00dd18f7f18754393182c73cd # v31
 
       - uses: DeterminateSystems/update-flake-lock@v28
         with: