diff --git a/README.md b/README.md
index 829d1094..19c457ff 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,8 @@ yarn storybook # Start Storybook
 yarn start # See the Hello World app
            # Uncomment line 97 of src/keycloak-theme/login/kcContext where it reads: `mockPageId: "login.ftl"`, reload https://localhost:3000
            # You can now develop your Login pages. (Don't forget to comment it back when you're done)
+          
+# Install mvn (Maven) if not already done. On mac it's 'brew install maven'
 
 yarn build-keycloak-theme # Actually build the theme
                           # Read the instruction printed on the console to see how to test