diff --git a/src/agentscope/rpc/rpc_client.py b/src/agentscope/rpc/rpc_client.py
index bc5215797..fe1311207 100644
--- a/src/agentscope/rpc/rpc_client.py
+++ b/src/agentscope/rpc/rpc_client.py
@@ -34,7 +34,7 @@ class RpcClient:
     """A client of Rpc agent server"""
 
     _CHANNEL_POOL = {}
-    _EXECUTOR = ThreadPoolExecutor()
+    _EXECUTOR = ThreadPoolExecutor(max_workers=32)
 
     def __init__(
         self,