diff --git a/src/main.cc b/src/main.cc
index 2766b13..d28028f 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -19,7 +19,7 @@ initLog()
 
 class RedisServer {
 public:
-    RedisServer(asio::ip::tcp::endpoint ep = asio::ip::tcp::endpoint(asio::ip::tcp::v4(), 6379), int io_thread_num = 1)
+    RedisServer(asio::ip::tcp::endpoint ep = asio::ip::tcp::endpoint(asio::ip::tcp::v4(), 6379), int io_thread_num = 2)
         : _io_context(),
           _io_context_guard(asio::make_work_guard(_io_context)),
           _io_threads(),