diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fbe8433..8744fd9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -102,7 +102,7 @@ jobs:
             matrix: ${{ steps.set-matrix.outputs.matrix }}
         steps:
             -   uses: actions/checkout@v4
-            -   uses: cachix/install-nix-action@v27
+            -   uses: cachix/install-nix-action@v29
                 with:
                     nix_path: nixpkgs=channel:nixos-24.05
                     extra_nix_config: "system-features = nixos-test benchmark big-parallel kvm"
@@ -133,7 +133,7 @@ jobs:
                         nix-store.nar-${{ runner.os }}-${{ hashFiles('flake.lock') }}-
                         nix-store.nar-${{ runner.os }}-
 
-            -   uses: cachix/install-nix-action@v27
+            -   uses: cachix/install-nix-action@v29
                 with:
                     nix_path: nixpkgs=channel:nixos-24.05
                     extra_nix_config: "system-features = nixos-test benchmark big-parallel kvm"