diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index bcbf0fad6..fa3e3b4d3 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@616559265b40713947b9c190a8ff4b507b5df49b # v31
+      - uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31
 
       - uses: DeterminateSystems/update-flake-lock@v28
         with: