diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 070f246..fa8f13e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -55,7 +55,7 @@ jobs:
         run: yarn
 
       - name: Install Nix
-        uses: cachix/install-nix-action@v20
+        uses: cachix/install-nix-action@v21
         with:
           nix_path: nixpkgs=channel:nixos-unstable