diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 29a5957..3aa7462 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
     env:
       NIX_PATH: "nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz"
     steps:
-    - uses: cachix/install-nix-action@v26
+    - uses: cachix/install-nix-action@V27
     - uses: actions/checkout@v4
     - name: Check format
       run: nix-shell --run 'nixpkgs-fmt --check .'
@@ -26,7 +26,7 @@ jobs:
     env:
       NIX_PATH: "nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz"
     steps:
-    - uses: cachix/install-nix-action@v26
+    - uses: cachix/install-nix-action@V27
     - uses: actions/checkout@v4
     - name: Check format
       run: nix-shell --run 'golangci-lint run'
@@ -36,7 +36,7 @@ jobs:
     env:
       NIX_PATH: "nixpkgs=https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz"
     steps:
-    - uses: cachix/install-nix-action@v26
+    - uses: cachix/install-nix-action@V27
     - uses: actions/checkout@v4
     - name: "Build gomod2nix"
       run: nix-shell --run "go build"
@@ -51,7 +51,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v26
+      - uses: cachix/install-nix-action@V27
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - id: set-matrix
@@ -67,7 +67,7 @@ jobs:
       matrix: ${{fromJSON(needs.list-jobs.outputs.matrix)}}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v26
+      - uses: cachix/install-nix-action@V27
         with:
           nix_path: nixpkgs=channel:nixos-unstable
       - name: "Build gomod2nix"