diff --git a/src/aria2p/client.py b/src/aria2p/client.py
index a2a31c2..020b9a7 100644
--- a/src/aria2p/client.py
+++ b/src/aria2p/client.py
@@ -145,7 +145,7 @@ def post(self, payload):
         response = requests.post(self.server, data=payload).json()
         if "result" in response:
             return response["result"]
-        raise JSONRPCError(response["code"], response["message"])
+        raise JSONRPCError(response["error"]["code"], response["error"]["message"])
 
     @staticmethod
     def get_payload(method, params=None, msg_id=None, as_json=True):