diff --git a/CMakeLists.txt b/CMakeLists.txt
index aad2649..ddcebb4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.18.4)
 
-project(candy LANGUAGES C CXX VERSION 5.8.1)
+project(candy LANGUAGES C CXX VERSION 5.8.2)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wfatal-errors")
 
diff --git a/src/core/client.cc b/src/core/client.cc
index 78ec0d3..f8083c1 100644
--- a/src/core/client.cc
+++ b/src/core/client.cc
@@ -174,6 +174,12 @@ int Client::startWsThread() {
 
     ws.setPingMessage(fmt::format("candy::{}::{}", CANDY_SYSTEM, CANDY_VERSION));
 
+    // 只需要开 wsThread, 执行过程中会设置 tun 并开 tunThread.
+    this->wsThread = std::thread([&] {
+        this->handleWebSocketMessage();
+        spdlog::debug("websocket client thread exit");
+    });
+
     sendVirtualMacMessage();
 
     if (!this->tunAddress.empty()) {
@@ -193,13 +199,6 @@ int Client::startWsThread() {
         }
         sendDynamicAddressMessage();
     }
-
-    // 只需要开 wsThread, 执行过程中会设置 tun 并开 tunThread.
-    this->wsThread = std::thread([&] {
-        this->handleWebSocketMessage();
-        spdlog::debug("websocket client thread exit");
-    });
-
     return 0;
 }
 
@@ -515,7 +514,7 @@ void Client::handlePeerConnMessage(WebSocketMessage &message) {
         return;
     }
 
-    if (peer.getState() != PeerState::CONNECTING) {
+    if (peer.getState() != PeerState::CONNECTING && peer.getState() != PeerState::PREPARING) {
         peer.updateState(PeerState::PREPARING);
         sendLocalPeerConnMessage(peer);
         return;
diff --git a/src/core/client.h b/src/core/client.h
index 18517e0..bd1884a 100644
--- a/src/core/client.h
+++ b/src/core/client.h
@@ -5,6 +5,7 @@
 #include "core/message.h"
 #include "peer/peer.h"
 #include "tun/tun.h"
+#include "utility/random.h"
 #include "websocket/client.h"
 #include <functional>
 #include <map>
@@ -138,7 +139,7 @@ class Client {
     std::map<uint32_t, PeerInfo> ipPeerMap;
     std::thread udpThread;
     std::thread tickThread;
-    uint64_t tickTick = std::rand();
+    uint64_t tickTick = randomUint32();
     uint32_t discoveryInterval;
 
     // Route
diff --git a/src/peer/peer.h b/src/peer/peer.h
index a1124be..f8c8e10 100644
--- a/src/peer/peer.h
+++ b/src/peer/peer.h
@@ -2,6 +2,7 @@
 #ifndef CANDY_PEER_PEER_H
 #define CANDY_PEER_PEER_H
 
+#include "utility/random.h"
 #include <any>
 #include <cstdint>
 #include <string>
@@ -29,7 +30,7 @@ class PeerInfo {
     } wide, local, real;
     uint8_t ack = 0;
     uint32_t count = 0;
-    uint32_t tick = std::rand();
+    uint32_t tick = randomUint32();
     uint32_t retry = RETRY_MIN;
     int32_t delay = DELAY_LIMIT;
 
diff --git a/src/websocket/client.cc b/src/websocket/client.cc
index 4cc522b..758565d 100644
--- a/src/websocket/client.cc
+++ b/src/websocket/client.cc
@@ -35,7 +35,6 @@ int WebSocketClient::connect(const std::string &address) {
             spdlog::critical("invalid websocket scheme: {}", address);
             return -1;
         }
-        this->ws->setReceiveTimeout(Poco::Timespan(this->timeout, 0));
         this->timestamp = Time::bootTime();
         return 0;
     } catch (std::exception &e) {
@@ -63,6 +62,13 @@ int WebSocketClient::read(WebSocketMessage &message) {
     }
 
     try {
+        Poco::Net::Socket::SocketList readList, writeList, exceptList;
+        readList.push_back(*this->ws.get());
+        if (Poco::Net::Socket::select(readList, writeList, exceptList, Poco::Timespan(this->timeout, 0)) <= 0 ||
+            readList.empty()) {
+            return 0;
+        }
+
         char buffer[1500] = {0};
         int flags = 0;
         int length = this->ws->receiveFrame(buffer, sizeof(buffer), flags);