diff --git a/fbchat/_client.py b/fbchat/_client.py
index 3243ef4..d639c74 100644
--- a/fbchat/_client.py
+++ b/fbchat/_client.py
@@ -77,6 +77,7 @@ class Client(object):
         self._default_thread_id = None
         self._default_thread_type = None
         self._req_url = ReqUrl()
+        self._pull_channel = 0
         self._markAlive = True
         self._buddylist = dict()
 
@@ -2378,7 +2379,12 @@ class Client(object):
             "viewer_uid": self._uid,
             "state": "active",
         }
-        self._get(self._req_url.PING, data, fix_request=True, as_json=False)
+        self._get(
+            self._req_url.PING.format(self._pull_channel),
+            data,
+            fix_request=True,
+            as_json=False,
+        )
 
     def _pullMessage(self):
         """Call pull api with seq value to get message data."""
@@ -2390,7 +2396,12 @@ class Client(object):
             "clientid": self._client_id,
             "state": "active" if self._markAlive else "offline",
         }
-        return self._get(self._req_url.STICKY, data, fix_request=True, as_json=True)
+        return self._get(
+            self._req_url.STICKY.format(self._pull_channel),
+            data,
+            fix_request=True,
+            as_json=True,
+        )
 
     def _parseDelta(self, m):
         def getThreadIdAndThreadType(msg_metadata):
@@ -3082,7 +3093,8 @@ class Client(object):
         except FBchatFacebookError as e:
             # Fix 502 and 503 pull errors
             if e.request_status_code in [502, 503]:
-                self._req_url.change_pull_channel()
+                # Bump pull channel, while contraining withing 0-4
+                self._pull_channel = (self._pull_channel + 1) % 5
                 self.startListening()
             else:
                 raise e
diff --git a/fbchat/_util.py b/fbchat/_util.py
index 150411a..a009a60 100644
--- a/fbchat/_util.py
+++ b/fbchat/_util.py
@@ -69,8 +69,8 @@ class ReqUrl(object):
     MARK_SEEN = "https://www.facebook.com/ajax/mercury/mark_seen.php"
     BASE = "https://www.facebook.com"
     MOBILE = "https://m.facebook.com/"
-    STICKY = "https://0-edge-chat.facebook.com/pull"
-    PING = "https://0-edge-chat.facebook.com/active_ping"
+    STICKY = "https://{}-edge-chat.facebook.com/pull"
+    PING = "https://{}-edge-chat.facebook.com/active_ping"
     UPLOAD = "https://upload.facebook.com/ajax/mercury/upload.php"
     INFO = "https://www.facebook.com/chat/user_info/"
     CONNECT = "https://www.facebook.com/ajax/add_friend/action.php?dpr=1"
@@ -116,18 +116,6 @@ class ReqUrl(object):
     UNSEND = "https://www.facebook.com/messaging/unsend_message/?dpr=1"
     FORWARD_ATTACHMENT = "https://www.facebook.com/mercury/attachments/forward/"
 
-    pull_channel = 0
-
-    def change_pull_channel(self, channel=None):
-        if channel is None:
-            self.pull_channel = (self.pull_channel + 1) % 5  # Pull channel will be 0-4
-        else:
-            self.pull_channel = channel
-        self.STICKY = "https://{}-edge-chat.facebook.com/pull".format(self.pull_channel)
-        self.PING = "https://{}-edge-chat.facebook.com/active_ping".format(
-            self.pull_channel
-        )
-
 
 facebookEncoding = "UTF-8"