diff --git a/README.md b/README.md
index 3f0c14f..35716e1 100644
--- a/README.md
+++ b/README.md
@@ -6,12 +6,21 @@ Add a private Julia package registry.
 
 ## Usage
 
+First add a `JULIA_PKG_SERVER` environment variable to the toplevel of your workflow file that references your private package server.
+
+```yml
+env:
+  JULIA_PKG_SERVER: https://my-pkg-server.example.com/
+```
+
+Then add the following step after your job's [`setup-julia`](https://github.com/julia-actions/setup-julia) step.
+
 ```yml
-- uses: PumasAI/add-private-registry
+- uses: PumasAI/add-private-registry@COMMIT
   with:
     juliahub_token_encoded: ${{ secrets.JULIAHUB_TOKEN_ENCODED }}
     private_registry_name: MyPrivateRegistry
     private_registry_uuid: 00000000-0000-0000-0000-000000000000
-  env:
-    JULIA_PKG_SERVER: https://my-pkg-server.example.com/
 ```
+
+where `COMMIT` is the commit SHA of this action that you would like to use.