diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 30b1a40..a6db0c4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@V28
+      - uses: cachix/install-nix-action@v29
       - uses: DeterminateSystems/magic-nix-cache-action@main
       - name: Build
         run: nix build -L
diff --git a/.github/workflows/mirror.yml b/.github/workflows/mirror.yml
index a72696a..9135a72 100644
--- a/.github/workflows/mirror.yml
+++ b/.github/workflows/mirror.yml
@@ -15,7 +15,7 @@ jobs:
       contents: write
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@V28
+      - uses: cachix/install-nix-action@v29
       - uses: DeterminateSystems/magic-nix-cache-action@main
       - name: Set release tag name
         id: release-tag-name