diff --git a/pymammotion/aliyun/cloud_gateway.py b/pymammotion/aliyun/cloud_gateway.py
index 17e6096..0b71eef 100644
--- a/pymammotion/aliyun/cloud_gateway.py
+++ b/pymammotion/aliyun/cloud_gateway.py
@@ -55,6 +55,8 @@ class AuthRefreshException(Exception):
 class DeviceOfflineException(Exception):
     """Raise exception when device is offline."""
 
+class LoginException(Exception):
+    """Raise exception when library cannot log in."""
 
 class CloudIOTGateway:
     """Class for interacting with Aliyun Cloud IoT Gateway."""
@@ -303,8 +305,11 @@ async def connect(self):
                 params={"request": json.dumps(_bodyParam, separators=(",", ":"))},
             ) as resp:
                 data = await resp.json()
-                self._connect_response = ConnectResponse.from_dict(data)
                 logger.debug(data)
+                if resp.status == 200:
+                    self._connect_response = ConnectResponse.from_dict(data)
+                    return self._connect_response
+                raise LoginException(data)
 
     async def login_by_oauth(self, country_code: str, auth_code: str):
         """Login by OAuth."""
@@ -372,8 +377,10 @@ async def login_by_oauth(self, country_code: str, auth_code: str):
             ) as resp:
                 data = await resp.json()
                 logger.debug(data)
-
-                self._login_by_oauth_response = LoginByOAuthResponse.from_dict(data)
+                if resp.status == 200:
+                    self._login_by_oauth_response = LoginByOAuthResponse.from_dict(data)
+                    return self._login_by_oauth_response
+                raise LoginException(data)
 
     def session_by_auth_code(self):
         """Create a session by auth code."""
diff --git a/pyproject.toml b/pyproject.toml
index 86239a0..a18f2d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,10 +1,10 @@
 [project]
 name        = "pymammotion"
-version     = "0.2.15"
+version     = "0.2.16"
 
 [tool.poetry]
 name        = "pymammotion"
-version     = "0.2.15"
+version     = "0.2.16"
 license     = "GNU-3.0"
 description = ""
 readme      = "README.md"
@@ -53,7 +53,7 @@ mypy = "^1.10.0"
 pre-commit = "^3.7.1"
 
 [tool.bumpver]
-current_version = "0.2.15"
+current_version = "0.2.16"
 version_pattern = "MAJOR.MINOR.PATCH"
 commit_message  = "Bump version {old_version} -> {new_version}"
 commit          = true