diff --git a/README.md b/README.md
index 8b6e90c..bf28943 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Pre-built (concatenated & minified) versions of the polyfills are maintained in
 `webcomponents-lite.js` includes all polyfills except for shadow DOM.
 
 
-## Manually Building
+### Manually Building
 
 If you wish to build the polyfills yourself, you'll need `node` and `gulp` on your system: