diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 8bab15352577a..fffd533857618 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -1253,7 +1253,7 @@ commands:
     yarn run prod
 
     # Starts a web server that manages and updates your assets as you modify them
-    # You'll need to run the webserver in debug mode too: `airflow webserver -d`
+    # You'll need to run the webserver in debug mode too: `airflow webserver -D`
     yarn run dev