diff --git a/README.md b/README.md
index 44954e0..71f1c8e 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Install Nix
-      uses: DeterminateSystems/nix-installer-action
+      uses: DeterminateSystems/nix-installer-action@main
       with:
         # Allow the installed Nix to make authenticated Github requests.
         # If you skip this, you will likely get rate limited.
@@ -24,4 +24,4 @@ jobs:
       run: nix build .
 ```
 
-See [`.github/workflows/ci.yml`](.github/workflows/ci.yml) for a full example.
\ No newline at end of file
+See [`.github/workflows/ci.yml`](.github/workflows/ci.yml) for a full example.