diff --git a/libfreeiot/adapters/mqtt/main.py b/libfreeiot/adapters/mqtt/main.py
index 23e4441..805fd30 100644
--- a/libfreeiot/adapters/mqtt/main.py
+++ b/libfreeiot/adapters/mqtt/main.py
@@ -42,6 +42,9 @@ def parse_driver_select(self, data):
         if self.parse_driver == 'msgpack':
             raise OSError("Parse driver 'msgpack' under development.")
         elif self.parse_driver == 'json':
-            return json.loads(data)
+            try:
+                return json.loads(data)
+            except json.JSONDecodeError as e:
+                print("Parsing failed, reason: ", e)
         else:
             raise OSError("Parse driver '" + self.parse_driver + "' under development.")
diff --git a/setup.py b/setup.py
index 519bb17..1747456 100644
--- a/setup.py
+++ b/setup.py
@@ -5,12 +5,12 @@
 
 setup(
     name = "libfreeiot",
-    version = "0.9.10",
+    version = "0.9.11",
     description = 'A free, open-source IoT Framework',
     author = 'Noah Gao',
     author_email = 'noahgaocn@outlook.com',
     url = 'https://github.com/noahziheng/freeiot',
-    download_url = 'https://github.com/noahziheng/freeiot/archive/0.9.10.tar.gz',
+    download_url = 'https://github.com/noahziheng/freeiot/archive/0.9.11.tar.gz',
     packages = find_packages(),
     install_requires=[    # 依赖列表
         'Flask>=0.12.2',