diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cd89643..b0c9875 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -142,7 +142,7 @@ jobs:
             matrix: ${{ steps.set-matrix.outputs.matrix }}
         steps:
             -   uses: actions/checkout@v4
-            -   uses: cachix/install-nix-action@v26
+            -   uses: cachix/install-nix-action@V27
             -   id: set-matrix
                 name: Generate Nix Matrix
                 run: |
@@ -170,7 +170,7 @@ jobs:
                         nix-store.nar-${{ runner.os }}-${{ hashFiles('flake.lock') }}-
                         nix-store.nar-${{ runner.os }}-
 
-            -   uses: cachix/install-nix-action@v26
+            -   uses: cachix/install-nix-action@V27
                 with:
                     nix_path: nixpkgs=channel:nixos-23.11
                     extra_nix_config: "system-features = nixos-test benchmark big-parallel kvm"