diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6321c6c..f0c8635 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.runs-on }}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@V27
+      - uses: cachix/install-nix-action@v29
       - uses: ./
       - run: actionlint
       - run: shellcheck nix-develop-gha.sh