diff --git a/include/pika_binlog_receiver_thread.h b/include/pika_binlog_receiver_thread.h
index 6d0b6a5629..aa04f711a1 100644
--- a/include/pika_binlog_receiver_thread.h
+++ b/include/pika_binlog_receiver_thread.h
@@ -44,7 +44,7 @@ class PikaBinlogReceiverThread {
         : binlog_receiver_(binlog_receiver) {
     }
 
-    virtual pink::PinkConn *NewPinkConn(
+    virtual std::shared_ptr<pink::PinkConn> NewPinkConn(
         int connfd,
         const std::string &ip_port,
         pink::ServerThread *thread,
@@ -52,10 +52,10 @@ class PikaBinlogReceiverThread {
         pink::PinkEpoll* pink_epoll) const override {
         if (g_pika_conf->identify_binlog_type() == "old") {
           LOG(INFO) << "Master conn factory create pika master conn";
-          return new PikaMasterConn(connfd, ip_port, binlog_receiver_);
+          return std::make_shared<PikaMasterConn>(connfd, ip_port, binlog_receiver_);
         } else {
           LOG(INFO) << "Master conn factory create pika new master conn";
-          return new PikaNewMasterConn(connfd, ip_port, binlog_receiver_);
+          return std::make_shared<PikaNewMasterConn>(connfd, ip_port, binlog_receiver_);
         }
     }
 
diff --git a/include/pika_client_conn.h b/include/pika_client_conn.h
index 3228b67a60..5d2805c6f5 100644
--- a/include/pika_client_conn.h
+++ b/include/pika_client_conn.h
@@ -17,6 +17,10 @@ class PikaWorkerSpecificData;
 
 class PikaClientConn: public pink::AsynRedisConn {
  public:
+  struct BgTaskArg {
+    std::shared_ptr<PikaClientConn> pcc;
+  };
+
   PikaClientConn(int fd, std::string ip_port, pink::ServerThread *server_thread,
                  void* worker_specific_data, pink::PinkEpoll* pink_epoll);
   virtual ~PikaClientConn() {}
@@ -58,7 +62,7 @@ struct ClientInfo {
   int fd;
   std::string ip_port;
   int64_t last_interaction;
-  PikaClientConn* conn;
+  std::shared_ptr<PikaClientConn> conn;
 };
 
 #endif
diff --git a/include/pika_dispatch_thread.h b/include/pika_dispatch_thread.h
index 73322b9aab..8cacfbc129 100644
--- a/include/pika_dispatch_thread.h
+++ b/include/pika_dispatch_thread.h
@@ -29,13 +29,13 @@ class PikaDispatchThread {
  private:
   class ClientConnFactory : public pink::ConnFactory {
    public:
-    virtual pink::PinkConn *NewPinkConn(
+    virtual std::shared_ptr<pink::PinkConn> NewPinkConn(
         int connfd,
         const std::string &ip_port,
         pink::ServerThread *server_thread,
         void* worker_specific_data,
         pink::PinkEpoll* pink_epoll) const {
-      return new PikaClientConn(connfd, ip_port, server_thread, worker_specific_data, pink_epoll);
+      return std::make_shared<PikaClientConn>(connfd, ip_port, server_thread, worker_specific_data, pink_epoll);
     }
   };
 
diff --git a/include/pika_heartbeat_thread.h b/include/pika_heartbeat_thread.h
index 1c0c231900..6602531f29 100644
--- a/include/pika_heartbeat_thread.h
+++ b/include/pika_heartbeat_thread.h
@@ -22,13 +22,13 @@ class PikaHeartbeatThread {
  private:
   class HeartbeatConnFactory : public pink::ConnFactory {
    public:
-    virtual pink::PinkConn *NewPinkConn(
+    virtual std::shared_ptr<pink::PinkConn> NewPinkConn(
         int connfd,
         const std::string &ip_port,
         pink::ServerThread *thread,
         void* worker_specific_data,
         pink::PinkEpoll* pink_epoll) const override {
-      return new PikaHeartbeatConn(connfd, ip_port);
+      return std::make_shared<PikaHeartbeatConn>(connfd, ip_port);
     }
   };
 
diff --git a/include/pika_monitor_thread.h b/include/pika_monitor_thread.h
index f5af0946c6..d7e26cb4d9 100644
--- a/include/pika_monitor_thread.h
+++ b/include/pika_monitor_thread.h
@@ -22,7 +22,7 @@ class PikaMonitorThread : public pink::Thread {
   PikaMonitorThread();
   virtual ~PikaMonitorThread();
 
-  void AddMonitorClient(PikaClientConn* client_ptr);
+  void AddMonitorClient(std::shared_ptr<PikaClientConn> client_ptr);
   void AddMonitorMessage(const std::string &monitor_message);
   int32_t ThreadClientList(std::vector<ClientInfo>* client = NULL);
   bool ThreadClientKill(const std::string& ip_port = "all");
diff --git a/include/pika_server.h b/include/pika_server.h
index 0f9a29685f..352f206198 100644
--- a/include/pika_server.h
+++ b/include/pika_server.h
@@ -342,12 +342,12 @@ class PikaServer {
    * PubSub used
    */
   int Publish(const std::string& channel, const std::string& msg);
-  void Subscribe(pink::PinkConn* conn,
+  void Subscribe(std::shared_ptr<pink::PinkConn> conn,
                  const std::vector<std::string>& channels,
                  const bool pattern,
                  std::vector<std::pair<std::string, int>>* result);
 
-  int UnSubscribe(pink::PinkConn* conn,
+  int UnSubscribe(std::shared_ptr<pink::PinkConn> conn,
                   const std::vector<std::string>& channels,
                   const bool pattern,
                   std::vector<std::pair<std::string, int>>* result);
@@ -363,7 +363,7 @@ class PikaServer {
   /*
    * Monitor used
    */
-  void AddMonitorClient(PikaClientConn* client_ptr);
+  void AddMonitorClient(std::shared_ptr<PikaClientConn> client_ptr);
   void AddMonitorMessage(const std::string &monitor_message);
   bool HasMonitorClients();
 
diff --git a/src/pika_client_conn.cc b/src/pika_client_conn.cc
index 8b8afc3c8b..70db071079 100644
--- a/src/pika_client_conn.cc
+++ b/src/pika_client_conn.cc
@@ -107,16 +107,16 @@ std::string PikaClientConn::DoCmd(
 
   // Monitor
   if (opt == kCmdNameMonitor) {
-    pink::PinkConn* conn = server_thread_->MoveConnOut(fd());
-    assert(conn == this);
-    g_pika_server->AddMonitorClient(static_cast<PikaClientConn*>(conn));
+    std::shared_ptr<PinkConn> conn = server_thread_->MoveConnOut(fd());
+    assert(conn.get() == this);
+    g_pika_server->AddMonitorClient(std::dynamic_pointer_cast<PikaClientConn>(conn));
     g_pika_server->AddMonitorMessage("OK");
     return ""; // Monitor thread will return "OK"
   }
 
   //PubSub
   if (opt == kCmdNamePSubscribe || opt == kCmdNameSubscribe) {             // PSubscribe or Subscribe
-    pink::PinkConn* conn = this;
+    std::shared_ptr<PinkConn> conn = std::dynamic_pointer_cast<PikaClientConn>(shared_from_this());
     if (!this->IsPubSub()) {
       conn = server_thread_->MoveConnOut(fd());
     }
@@ -134,7 +134,8 @@ std::string PikaClientConn::DoCmd(
       channels.push_back(slash::StringToLower(argv[i]));
     }
     std::vector<std::pair<std::string, int>> result;
-    int subscribed = g_pika_server->UnSubscribe(this, channels, opt == kCmdNamePUnSubscribe, &result);
+    std::shared_ptr<PinkConn> conn = std::dynamic_pointer_cast<PikaClientConn>(shared_from_this());
+    int subscribed = g_pika_server->UnSubscribe(conn, channels, opt == kCmdNamePUnSubscribe, &result);
     if (subscribed == 0 && this->IsPubSub()) {
       /*
        * if the number of client subscribed is zero,
@@ -235,7 +236,9 @@ std::string PikaClientConn::DoCmd(
 }
 
 void PikaClientConn::AsynProcessRedisCmd() {
-  g_pika_server->Schedule(&DoBackgroundTask, this);
+  BgTaskArg* arg = new BgTaskArg();
+  arg->pcc = std::dynamic_pointer_cast<PikaClientConn>(shared_from_this());
+  g_pika_server->Schedule(&DoBackgroundTask, arg);
 }
 
 void PikaClientConn::BatchExecRedisCmd() {
@@ -267,8 +270,9 @@ int PikaClientConn::DealMessage(PikaCmdArgsType& argv) {
 }
 
 void PikaClientConn::DoBackgroundTask(void* arg) {
-  PikaClientConn* conn = static_cast<PikaClientConn*>(arg);
-  conn->BatchExecRedisCmd();
+  BgTaskArg* bg_arg = reinterpret_cast<BgTaskArg*>(arg);
+  bg_arg->pcc->BatchExecRedisCmd();
+  delete bg_arg;
 }
 
 // Initial permission status
diff --git a/src/pika_monitor_thread.cc b/src/pika_monitor_thread.cc
index 5e79678392..b281fd5fc6 100644
--- a/src/pika_monitor_thread.cc
+++ b/src/pika_monitor_thread.cc
@@ -35,7 +35,7 @@ PikaMonitorThread::~PikaMonitorThread() {
   LOG(INFO) << " PikaMonitorThread " << pthread_self() << " exit!!!";
 }
 
-void PikaMonitorThread::AddMonitorClient(PikaClientConn* client_ptr) {
+void PikaMonitorThread::AddMonitorClient(std::shared_ptr<PikaClientConn> client_ptr) {
   StartThread();
   slash::MutexLock lm(&monitor_mutex_protector_);
   monitor_clients_.push_back(ClientInfo{client_ptr->fd(), client_ptr->ip_port(), 0, client_ptr});
@@ -46,12 +46,10 @@ void PikaMonitorThread::RemoveMonitorClient(const std::string& ip_port) {
   for (; iter != monitor_clients_.end(); ++iter) {
     if (ip_port == "all") {
       close(iter->fd);
-      delete iter->conn;
       continue;
     }
     if (iter->ip_port  == ip_port) {
       close(iter->fd);
-      delete iter->conn;
       break;
     }
   }
diff --git a/src/pika_server.cc b/src/pika_server.cc
index b8c239aa6d..26af436808 100644
--- a/src/pika_server.cc
+++ b/src/pika_server.cc
@@ -1485,12 +1485,18 @@ int PikaServer::Publish(const std::string& channel, const std::string& msg) {
 }
 
 // Subscribe/PSubscribe
-void PikaServer::Subscribe(pink::PinkConn* conn, const std::vector<std::string>& channels, bool pattern, std::vector<std::pair<std::string, int>>* result) {
+void PikaServer::Subscribe(std::shared_ptr<pink::PinkConn> conn,
+                           const std::vector<std::string>& channels,
+                           bool pattern,
+                           std::vector<std::pair<std::string, int>>* result) {
   pika_pubsub_thread_->Subscribe(conn, channels, pattern, result);
 }
 
 // UnSubscribe/PUnSubscribe
-int PikaServer::UnSubscribe(pink::PinkConn* conn, const std::vector<std::string>& channels, bool pattern, std::vector<std::pair<std::string, int>>* result) {
+int PikaServer::UnSubscribe(std::shared_ptr<pink::PinkConn> conn,
+                            const std::vector<std::string>& channels,
+                            bool pattern,
+                            std::vector<std::pair<std::string, int>>* result) {
   int subscribed = pika_pubsub_thread_->UnSubscribe(conn, channels, pattern, result);
   return subscribed;
 }
@@ -1511,7 +1517,7 @@ int PikaServer::PubSubNumPat() {
   return pika_pubsub_thread_->PubSubNumPat();
 }
 
-void PikaServer::AddMonitorClient(PikaClientConn* client_ptr) {
+void PikaServer::AddMonitorClient(std::shared_ptr<PikaClientConn> client_ptr) {
   monitor_thread_->AddMonitorClient(client_ptr);
 }
 
diff --git a/third/pink b/third/pink
index 4c8d083798..9eedb94646 160000
--- a/third/pink
+++ b/third/pink
@@ -1 +1 @@
-Subproject commit 4c8d0837980d6af367c8876b400ae49657261404
+Subproject commit 9eedb94646c8d565a06a2f855ae90cfb9e107814