diff --git a/server/wsproxy/master.cc b/server/wsproxy/master.cc
index 72ce56c..1eafb29 100644
--- a/server/wsproxy/master.cc
+++ b/server/wsproxy/master.cc
@@ -21,7 +21,6 @@ void Master::Init(int instance_id, const std::string& remote_ip, int remote_port
 
     recv_bufflen_ = 0;
     last_pong_tick = a8::XGetTickCount();
-    recv_buff_ = (char*) malloc(PACK_MAX * 2);
     tcp_client_ = std::make_shared<a8::TcpClient>();
     tcp_client_->remote_address = remote_ip;
     tcp_client_->remote_port = remote_port;
@@ -51,8 +50,6 @@ void Master::UnInit()
     }
     tcp_client_ = nullptr;
     recv_bufflen_ = 0;
-    free(recv_buff_);
-    recv_buff_ = nullptr;
 }
 
 void Master::Open()
@@ -133,7 +130,7 @@ void Master::on_socketread(a8::TcpClient* sender, char* buf, unsigned int len)
         f8::UdpLog::Instance()->Debug("recvied bad package", {});
     }
     if (offset > 0 && offset < recv_bufflen_) {
-        memmove(recv_buff_, recv_buff_ + offset, recv_bufflen_ - offset);
+        memmove(recv_buff_.data(), recv_buff_.data() + offset, recv_bufflen_ - offset);
     }
     recv_bufflen_ -= offset;
     #if 1
diff --git a/server/wsproxy/master.h b/server/wsproxy/master.h
index f06cb8b..34f2a05 100644
--- a/server/wsproxy/master.h
+++ b/server/wsproxy/master.h
@@ -39,7 +39,7 @@ class Master
     void CheckAlive();
 
  private:
-    char *recv_buff_ = nullptr;
+    std::array<char, PACK_MAX> recv_buff_;
     unsigned int recv_bufflen_ = 0;
     std::shared_ptr<a8::TcpClient> tcp_client_;
     f8::TimerWp timer_wp_;