diff --git a/bfxapi/models/Subscription.py b/bfxapi/models/Subscription.py
index 331a046..bc32ba4 100644
--- a/bfxapi/models/Subscription.py
+++ b/bfxapi/models/Subscription.py
@@ -39,7 +39,7 @@ class Subscription:
         """
         if not self.is_subscribed():
             raise Exception("Subscription is not subscribed to websocket")
-        payload = {'event': 'unsubscribe', 'chan_id': self.chan_id}
+        payload = {'event': 'unsubscribe', 'chanId': self.chan_id}
         await self._ws.send(json.dumps(payload))
 
     async def subscribe(self):
diff --git a/bfxapi/models/subscription.py b/bfxapi/models/subscription.py
index 331a046..bc32ba4 100644
--- a/bfxapi/models/subscription.py
+++ b/bfxapi/models/subscription.py
@@ -39,7 +39,7 @@ class Subscription:
         """
         if not self.is_subscribed():
             raise Exception("Subscription is not subscribed to websocket")
-        payload = {'event': 'unsubscribe', 'chan_id': self.chan_id}
+        payload = {'event': 'unsubscribe', 'chanId': self.chan_id}
         await self._ws.send(json.dumps(payload))
 
     async def subscribe(self):
diff --git a/bfxapi/websockets/BfxWebsocket.py b/bfxapi/websockets/BfxWebsocket.py
index 172d291..e2e304c 100644
--- a/bfxapi/websockets/BfxWebsocket.py
+++ b/bfxapi/websockets/BfxWebsocket.py
@@ -194,7 +194,10 @@ class BfxWebsocket(GenericWebsocket):
         await self.subscriptionManager.confirm_unsubscribe(data)
 
     async def _system_error_handler(self, data):
-        self._emit('error', data)
+        err_string = ERRORS[data.get('code', 10000)]
+        err_string = "{} - {}".format(ERRORS[data.get('code', 10000)],
+                                      data.get("msg", ""))
+        self._emit('error', Exception(err_string))
 
     async def _system_auth_handler(self, data):
         if data.get('status') == 'FAILED':
diff --git a/bfxapi/websockets/SubscriptionManager.py b/bfxapi/websockets/SubscriptionManager.py
index b6be132..df961ee 100644
--- a/bfxapi/websockets/SubscriptionManager.py
+++ b/bfxapi/websockets/SubscriptionManager.py
@@ -91,7 +91,7 @@ class SubscriptionManager:
 
         This function is mostly used to force the channel to produce a fresh snapshot.
         """
-        sub = self.subscriptions_chanid[chan_d]
+        sub = self.subscriptions_chanid[chan_id]
 
         async def re_sub():
             await sub.subscribe()