diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7c1f068920c..68d88854849 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -41,7 +41,7 @@ To build the library files, run
 jake lib
 ```
 
-### `src/lib/dom.generated.d.ts` and `src/lib/webworker.generated.d.ts`
+#### `src/lib/dom.generated.d.ts` and `src/lib/webworker.generated.d.ts`
 
 These two files represent the DOM typings and are auto-generated. To make any modifications to them, please submit a PR to  https://github.com/Microsoft/TSJS-lib-generator