diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6468e25b..ec87aaac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+## v1.1.0(2020-09-21)
+- Compatible with the 1.1.0 version of nebula-graph
+
+- New features
+    - Support using storage client to scan vertices and scan edges
+- Changes
+    - The `ExecutionResponse` add optional `warning_msg`
+    - Delete the debug log
+
 ## v1.0.0(2020-06-08)
 - Compatible with the 1.0.0 version of nebula-graph
 
diff --git a/README.md b/README.md
index 82cf05b1..b56e1288 100644
--- a/README.md
+++ b/README.md
@@ -110,4 +110,4 @@ If you want to run the sample code, please install `prettytable` and `networkx`
 | 1.0.0-rc2-1 | 1.0.0-rc2 / 1.0.0-rc3 |
 | 1.0.0rc4 | 1.0.0-rc4 |
 | 1.0.0.post0 | >= 1.0.0 |
-| 1.0.2 | >= 1.0.2 |
+| 1.1.0 | >= 1.1.0 |
diff --git a/nebula/Client.py b/nebula/Client.py
index 432de19d..523982e0 100644
--- a/nebula/Client.py
+++ b/nebula/Client.py
@@ -27,6 +27,7 @@ def __init__(self, pool):
         self._password = None
         self._space = None
         self._lock = threading.Lock()
+        self._is_ok = False
 
     def authenticate(self, user, password):
         """authenticate to graph server
diff --git a/setup.py b/setup.py
index e7fbeff1..5c2d8330 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
 
 setup(
     name='nebula-python',
-    version="1.0.2",
+    version="1.1.0",
     license = "Apache 2.0 + Common Clause 1.0",
     description='Python client for Nebula Graph',
     url='https://github.com/vesoft-inc/nebula-python',