diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8e897f7..52e9b5d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: cachix/install-nix-action@08dcb3a5e62fa31e2da3d490afc4176ef55ecd72 # v30
+    - uses: cachix/install-nix-action@02a151ada4993995686f9ed4f1be7cfbb229e56f # v31
       with:
         nix_path: nixpkgs=channel:nixos-unstable
         github_access_token: ${{ secrets.GITHUB_TOKEN }}