diff --git a/README.md b/README.md
index a89599fc5b..c86d8d11bd 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@ API instance (ex. `http://localhost:4000`).
 
 Then run the following commands:
 
+- `npm install`
 - `gulp build`
 
 You can now load the extension into your browser through the browser's extension tools page: