diff --git a/qcloud_cos/cos_client.py b/qcloud_cos/cos_client.py
index 54c8c36d..cdb30e15 100644
--- a/qcloud_cos/cos_client.py
+++ b/qcloud_cos/cos_client.py
@@ -370,7 +370,7 @@ def get_presigned_url(self, Bucket, Key, Method, Expired=300, Params={}, Headers
         """
         url = self._conf.uri(bucket=Bucket, path=Key)
         sign = self.get_auth(Method=Method, Bucket=Bucket, Key=Key, Expired=Expired, Headers=Headers, Params=Params)
-        url = url + '?sign=' + quote(sign)
+        url = url + '?' + sign
         if Params:
             url = url + '&' + urlencode(Params)
         return url
diff --git a/qcloud_cos/version.py b/qcloud_cos/version.py
index e6d2d486..f975ef2a 100644
--- a/qcloud_cos/version.py
+++ b/qcloud_cos/version.py
@@ -1,2 +1,2 @@
 
-__version__ = '5.1.6.6'
+__version__ = '5.1.6.7'
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 2f23f3f9..91df2212 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ def long_description():
 
 setup(
     name='cos-python-sdk-v5',
-    version='1.6.6',
+    version='1.6.7',
     url='https://www.qcloud.com/',
     license='MIT',
     author='tiedu, lewzylu, channingliu',