diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index 855b105ea..a923edd1d 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@8887e596b4ee1134dae06b98d573bd674693f47c # v26
+      - uses: cachix/install-nix-action@ba0dd844c9180cbf77aa72a116d6fbc515d0e87b # v27
 
       - uses: DeterminateSystems/update-flake-lock@v21
         with: