diff --git a/packages/notebook-extension/src/index.ts b/packages/notebook-extension/src/index.ts
index 45d34d1f4b..ab8f3c2549 100644
--- a/packages/notebook-extension/src/index.ts
+++ b/packages/notebook-extension/src/index.ts
@@ -414,7 +414,7 @@ const tabIcon: JupyterFrontEndPlugin<void> = {
     const baseURL = window.location.origin;
     const notebookIcon = `${baseURL}/static/favicons/favicon-notebook.ico`;
     const busyIcon = `${baseURL}/static/favicons/favicon-busy-1.ico`;
-    
+
     const updateBrowserFavicon = (
       status: ISessionContext.KernelDisplayStatus
     ) => {