diff --git a/aliyun/log/logclient.py b/aliyun/log/logclient.py
index 245322e..13763a9 100644
--- a/aliyun/log/logclient.py
+++ b/aliyun/log/logclient.py
@@ -2560,6 +2560,31 @@ def create_project(self, project_name, project_des, resource_group_id='', data_r
 
         (resp, header) = self._send("POST", project_name, body, resource, params, headers)
         return CreateProjectResponse(header, resp)
+    
+    def update_project(self, project_name, project_des):
+        """ Update a project
+        Unsuccessful operation will cause an LogException.
+
+        :type project_name: string
+        :param project_name: the Project name
+
+        :type project_des: string
+        :param project_des: the description of a project
+
+        :return: UpdateProjectResponse
+
+        :raise: LogException
+        """
+
+        params = {}
+        body = {"description": project_des}
+
+        body = six.b(json.dumps(body))
+        headers = {'Content-Type': 'application/json', 'x-log-bodyrawsize': str(len(body))}
+        resource = "/"
+
+        (resp, header) = self._send("PUT", project_name, body, resource, params, headers)
+        return UpdateProjectResponse(header, resp)
 
     def get_project(self, project_name):
         """ get project
diff --git a/aliyun/log/project_response.py b/aliyun/log/project_response.py
index 8b81640..1712e2c 100755
--- a/aliyun/log/project_response.py
+++ b/aliyun/log/project_response.py
@@ -9,7 +9,7 @@
 from .util import Util
 
 __all__ = [
-    'CreateProjectResponse', 'DeleteProjectResponse',
+    'CreateProjectResponse', 'UpdateProjectResponse', 'DeleteProjectResponse',
     'GetProjectResponse', 'ListProjectResponse',
     'GetProjectTagsResponse',
 ]
@@ -26,6 +26,17 @@ def log_print(self):
         print('CreateProjectResponse:')
         print('headers:', self.get_all_headers())
 
+class UpdateProjectResponse(LogResponse):
+    """
+    Response of update_project
+    """
+    def __init__(self, header, resp=''):
+        LogResponse.__init__(self, header, resp)
+
+    def log_print(self):
+        print('UpdateProjectResponse:')
+        print('headers:', self.get_all_headers())
+
 
 class DeleteProjectResponse(LogResponse):
     def __init__(self, header, resp=''):