diff --git a/wideq/client.py b/wideq/client.py
index a667bcf..913adf1 100644
--- a/wideq/client.py
+++ b/wideq/client.py
@@ -6,6 +6,7 @@ import enum
 import logging
 import requests
 import base64
+import re
 from collections import namedtuple
 from typing import Any, Dict, Generator, List, Optional
 
@@ -436,11 +437,12 @@ class Device(object):
         try:
             return json.loads(data)
         except json.decoder.JSONDecodeError:
-            LOGGER.warning(
-                'JSONDecodeError malformed json (%s)', data)
-            # Added fix to correct malformed JSON!
-            # see https://github.com/sampsyo/wideq/issues/64
-            return json.loads(data.replace('{[', '[').replace(']}', ']'))
+            try:
+                # malformed JSON may contains unwanted [bracket]
+                LOGGER.debug('attempting to fix JSON format')
+                return json.loads( re.sub(r'^\{(.*?)\}$', r'\1', data))
+            except json.decoder.JSONDecodeError:
+                raise core.JsonError(self.device.id, data)
 
     def _get_control(self, key):
         """Look up a device's control value."""
diff --git a/wideq/core.py b/wideq/core.py
index 2a10574..81abee3 100644
--- a/wideq/core.py
+++ b/wideq/core.py
@@ -168,6 +168,15 @@ class MonitorError(APIError):
         self.device_id = device_id
         self.code = code
 
+class JsonError(APIError):
+    """JSON Decode error
+    The received json value is malformed
+    """
+
+    def __init__(self, device_id, json):
+        self.device_id = device_id
+        self.json = json
+
 
 API_ERRORS = {
     "0102": NotLoggedInError,