diff --git a/.env.example b/.env.example
index 2782a06..41468ab 100644
--- a/.env.example
+++ b/.env.example
@@ -60,5 +60,5 @@ VOLCENGINE_TTS_ACCESS_TOKEN=xxx
 # Enable LangGraph checkpoint saver, supports MongoDB, Postgres
 #LANGGRAPH_CHECKPOINT_SAVER=true
 # Set the database URL for saving checkpoints
-#LANGGRAPH_CHECKPOINT_DB_URL="ongodb://localhost:27017/
-#LANGGRAPH_CHECKPOINT_DB_URL=postgresql://localhost:5432/postgres
\ No newline at end of file
+#LANGGRAPH_CHECKPOINT_DB_URL=mongodb://localhost:27017/
+#LANGGRAPH_CHECKPOINT_DB_URL=postgresql://localhost:5432/postgres