diff --git a/qcloud_cos/version.py b/qcloud_cos/version.py
index 7a4eeffd..6b5bb937 100644
--- a/qcloud_cos/version.py
+++ b/qcloud_cos/version.py
@@ -1,2 +1,2 @@
 
-__version__ = '5.1.8.6'
+__version__ = '5.1.8.7'
diff --git a/setup.py b/setup.py
index 74b15013..3e54fce3 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ def long_description():
 
 setup(
     name='cos-python-sdk-v5',
-    version='1.8.6',
+    version='1.8.7',
     url='https://www.qcloud.com/',
     license='MIT',
     author='tiedu, lewzylu, channingliu',
diff --git a/ut/test.py b/ut/test.py
index 5586b1b1..abfcfeef 100644
--- a/ut/test.py
+++ b/ut/test.py
@@ -947,6 +947,12 @@ def test_put_get_delete_bucket_domain():
             },
         ]
     }
+
+    response = client.delete_bucket_domain(
+	Bucket=test_bucket
+    ) 
+
+    time.sleep(2)
     response = client.put_bucket_domain(
         Bucket=test_bucket,
         DomainConfiguration=domain_config