diff --git a/api/db/db_models.py b/api/db/db_models.py
index 033a96688..4491526bf 100644
--- a/api/db/db_models.py
+++ b/api/db/db_models.py
@@ -332,7 +332,7 @@ DB.lock = DatabaseLock
 def close_connection():
     try:
         if DB:
-            DB.close()
+            DB.close_stale(age=30)
     except Exception as e:
         LOGGER.exception(e)
 
diff --git a/api/ragflow_server.py b/api/ragflow_server.py
index a4e5b7715..8878817a3 100644
--- a/api/ragflow_server.py
+++ b/api/ragflow_server.py
@@ -94,7 +94,7 @@ if __name__ == '__main__':
         werkzeug_logger = logging.getLogger("werkzeug")
         for h in access_logger.handlers:
             werkzeug_logger.addHandler(h)
-        run_simple(hostname=HOST, port=HTTP_PORT, application=app, processes=5, use_reloader=RuntimeConfig.DEBUG, use_debugger=RuntimeConfig.DEBUG)
+        run_simple(hostname=HOST, port=HTTP_PORT, application=app, threaded=True, use_reloader=RuntimeConfig.DEBUG, use_debugger=RuntimeConfig.DEBUG)
     except Exception:
         traceback.print_exc()
         os.kill(os.getpid(), signal.SIGKILL)
\ No newline at end of file
diff --git a/rag/llm/__init__.py b/rag/llm/__init__.py
index 3fdab822d..50b541f41 100644
--- a/rag/llm/__init__.py
+++ b/rag/llm/__init__.py
@@ -33,7 +33,7 @@ EmbeddingModel = {
     "BAAI": DefaultEmbedding,
     "Mistral": MistralEmbed,
     "Bedrock": BedrockEmbed,
-    "Gemini":GeminiEmbed,
+    "Gemini":GeminiEmbed
 }