diff --git a/README.md b/README.md
index ebe54e2..33ccfd2 100644
--- a/README.md
+++ b/README.md
@@ -17,8 +17,8 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
-    - uses: cachix/install-nix-action@v6
+    - uses: actions/checkout@v2
+    - uses: cachix/install-nix-action@v7
     - run: nix-build
 ```