diff --git a/hbmqtt/client/_client.py b/hbmqtt/client/_client.py
index 6987627..7a2e2cb 100644
--- a/hbmqtt/client/_client.py
+++ b/hbmqtt/client/_client.py
@@ -242,7 +242,7 @@ class MQTTClient:
             self._session.local_address, self._session.local_port = self._session.writer.get_extra_info('sockname')
 
             # Send CONNECT packet and wait for CONNACK
-            packet = ConnectPacket.build_request_from_session(self._session)
+            packet = self._session.build_connect_packet()
             yield from packet.to_stream(self._session.writer)
             self.logger.debug(" -out-> " + repr(packet))
 
diff --git a/hbmqtt/mqtt/connect.py b/hbmqtt/mqtt/connect.py
index ec8febe..f9410b7 100644
--- a/hbmqtt/mqtt/connect.py
+++ b/hbmqtt/mqtt/connect.py
@@ -4,7 +4,6 @@
 from hbmqtt.mqtt.packet import MQTTPacket, MQTTFixedHeader, PacketType, MQTTVariableHeader, MQTTPayload
 from hbmqtt.codecs import *
 from hbmqtt.errors import MQTTException, CodecException, HBMQTTException, NoDataException
-from hbmqtt.session import Session
 
 
 class ConnectVariableHeader(MQTTVariableHeader):
@@ -209,36 +208,3 @@ class ConnectPacket(MQTTPacket):
         super().__init__(header)
         self.variable_header = vh
         self.payload = payload
-
-    @classmethod
-    def build_request_from_session(cls, session: Session):
-        vh = ConnectVariableHeader()
-        payload = ConnectPayload()
-
-        vh.keep_alive = session.keep_alive
-        vh.clean_session_flag = session.clean_session
-        vh.will_retain_flag = session.will_retain
-        payload.client_id = session.client_id
-
-        if session.username:
-            vh.username_flag = True
-            payload.username = session.username
-        else:
-            vh.username_flag = False
-
-        if session.password:
-            vh.password_flag = True
-            payload.password = session.password
-        else:
-            vh.password_flag = False
-        if session.will_flag:
-            vh.will_flag = True
-            vh.will_qos = session.will_qos
-            payload.will_message = session.will_message
-            payload.will_topic = session.will_topic
-        else:
-            vh.will_flag = False
-
-        header = MQTTFixedHeader(PacketType.CONNECT, 0x00)
-        packet = cls(header, vh, payload)
-        return packet
diff --git a/hbmqtt/session.py b/hbmqtt/session.py
index 91fd813..9764864 100644
--- a/hbmqtt/session.py
+++ b/hbmqtt/session.py
@@ -6,6 +6,7 @@ import logging
 from enum import Enum
 from hbmqtt.mqtt.packet import PacketType
 from hbmqtt.mqtt.packet import MQTTFixedHeader
+from hbmqtt.mqtt.connect import ConnectVariableHeader, ConnectPacket, ConnectPayload
 from hbmqtt.mqtt import packet_class
 from hbmqtt.errors import NoDataException
 
@@ -48,6 +49,39 @@ class Session:
             self.incoming_queues[p] = asyncio.Queue()
         self.outgoing_queue = asyncio.Queue()
 
+    def build_connect_packet(self):
+        vh = ConnectVariableHeader()
+        payload = ConnectPayload()
+
+        vh.keep_alive = self.keep_alive
+        vh.clean_session_flag = self.clean_session
+        vh.will_retain_flag = self.will_retain
+        payload.client_id = self.client_id
+
+        if self.username:
+            vh.username_flag = True
+            payload.username = self.username
+        else:
+            vh.username_flag = False
+
+        if self.password:
+            vh.password_flag = True
+            payload.password = self.password
+        else:
+            vh.password_flag = False
+        if self.will_flag:
+            vh.will_flag = True
+            vh.will_qos = self.will_qos
+            payload.will_message = self.will_message
+            payload.will_topic = self.will_topic
+        else:
+            vh.will_flag = False
+
+        header = MQTTFixedHeader(PacketType.CONNECT, 0x00)
+        packet = ConnectPacket(header, vh, payload)
+        return packet
+
+
     @property
     def next_packet_id(self):
         self._packet_id += 1