diff --git a/auto_height.module b/auto_height.module
index 485abe4..6742f05 100644
--- a/auto_height.module
+++ b/auto_height.module
@@ -18,7 +18,7 @@ function auto_height_help($route_name, RouteMatchInterface $route_match) {
 
   switch ($route_name) {
     case 'help.page.auto_height':
-      return check_markup(file_get_contents(dirname(__FILE__) . '/README.txt'));
+      return check_markup(file_get_contents(dirname(__FILE__) . '/README.md'));
   }
 
 }