diff --git a/app/routes/api.py b/app/routes/api.py
index 6c141ab..4f75d27 100644
--- a/app/routes/api.py
+++ b/app/routes/api.py
@@ -25,7 +25,7 @@ def thread_updates(thread_id):
     if not new_post:
         return {'status': 'none'}
 
-    url = url_for('threads.thread', slug=thread.slug, after=new_post['id'], _anchor=f'post-{new_post['id']}')
+    url = url_for('threads.thread', slug=thread.slug, after=new_post['id'], _anchor=f"post-{new_post['id']}")
     return {'status': 'new_post', 'url': url}