diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 44811cd..5856664 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: cachix/install-nix-action@V28
+      - uses: cachix/install-nix-action@v29
 
       - uses: cachix/cachix-action@v15
         with:
diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index 5d65caf..2b95b51 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@V28
+      - uses: cachix/install-nix-action@v29
         with:
           github_access_token: ${{ github.token }}