diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4cc94a3b5..494398260 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
       uses: actions/checkout@v4.1.7
 
     - name: Install Nix
-      uses: cachix/install-nix-action@V28
+      uses: cachix/install-nix-action@v29
       with:
         nix_path: nixpkgs=channel:nixos-unstable
 
@@ -53,7 +53,7 @@ jobs:
       uses: actions/checkout@v4.1.7
 
     - name: Install Nix
-      uses: cachix/install-nix-action@V28
+      uses: cachix/install-nix-action@v29
       with:
         nix_path: nixpkgs=channel:nixos-unstable
 
diff --git a/.github/workflows/pulls.yml b/.github/workflows/pulls.yml
index be1d944e2..27e4e1af5 100644
--- a/.github/workflows/pulls.yml
+++ b/.github/workflows/pulls.yml
@@ -11,7 +11,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
       - uses: actions/checkout@v4.1.7
-      - uses: cachix/install-nix-action@V28
+      - uses: cachix/install-nix-action@v29
       - id: set-matrix
         name: Evaluate flake
         run: nix flake show --all-systems