diff --git a/README.md b/README.md
index 28dad89..f5ae8e4 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v19
+    - uses: cachix/install-nix-action@v20
       with:
         github_access_token: ${{ secrets.GITHUB_TOKEN }}
     - run: nix build