diff --git a/docs/modules/chat/examples/vector_db_qa_with_sources.ipynb b/docs/modules/chat/examples/vector_db_qa_with_sources.ipynb
index 1d2f637d98..c58a8dbca5 100644
--- a/docs/modules/chat/examples/vector_db_qa_with_sources.ipynb
+++ b/docs/modules/chat/examples/vector_db_qa_with_sources.ipynb
@@ -165,7 +165,7 @@
    "source": [
     "chain({\"question\": \"What did the president say about Justice Breyer\"}, return_only_outputs=True)"
    ]
-  },
+  }
  ],
  "metadata": {
   "kernelspec": {