diff --git a/README.md b/README.md
index b26b6f0..ebe54e2 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v1
-    - uses: cachix/install-nix-action@v3
+    - uses: cachix/install-nix-action@v6
     - run: nix-build
 ```