diff --git a/README.md b/README.md
index eb656347..025c41e2 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,20 @@
 
 last update:2019/10/16
 
+Version:4.0.0
+
+:exclamation::exclamation::exclamation:
+update websocket-client==0.56
+:exclamation:
+please uninstall all websocket-client and update up websocket-client==0.56
+```
+sudo pip uninstall websocket-client
+sudo pip install websocket-client==0.56
+```
+:exclamation:
+
 Version:3.9.8
+
 add [reset_practice_balance](#resetpracticebalance) api
 
 
@@ -130,28 +143,13 @@ from iqoptionapi.api import IQOptionAPI
 
 ## Can not loging problem
 
-
-### problem 1
-this problem i have been pull request to websocket-client
-
-If you get this problem
-
-```bash
-error from callback <bound method WebsocketClient.on_message of <iqoptionapi.ws.client.WebsocketClient object at 0x7f174fdb5e48>>: on_message() missing 1 required positional argument: 'message'
-  File "/usr/lib/python3.7/site-packages/websocket/_app.py", line 343, in _callback
-   callback(*args)
-```
-#### fix way 1(install old websocket-client version)
+#### fix way 1 
 ```bash
 sudo pip3 uninstall websocket-client
-sudo pip3 install websocket-client==0.47.0
+sudo pip3 install websocket-client==0.56
 ```
 
-#### fix way 2(install my fix version on latest)
-```bash
-sudo pip3 install -U git+git://github.com/Lu-Yi-Hsun/websocket-client.git
-```
----
+ 
 
 ### problem 2
 
diff --git a/iqoptionapi/stable_api.py b/iqoptionapi/stable_api.py
index c61656ba..f15afdad 100644
--- a/iqoptionapi/stable_api.py
+++ b/iqoptionapi/stable_api.py
@@ -19,7 +19,7 @@ def nested_dict(n, type):
 
 
 class IQ_Option:
-    __version__ = "3.9.8"
+    __version__ = "4.0.0"
 
     def __init__(self, email, password):
         self.size = [1, 5, 10, 15, 30, 60, 120, 300, 600, 900, 1800,
diff --git a/iqoptionapi/ws/client.py b/iqoptionapi/ws/client.py
index 17c39325..75d54483 100644
--- a/iqoptionapi/ws/client.py
+++ b/iqoptionapi/ws/client.py
@@ -36,7 +36,7 @@ def dict_queue_add(self,dict,maxdict,key1,key2,key3,value):
                 else:
                     #del mini key
                     del dict[key1][key2][sorted(dict[key1][key2].keys(), reverse=False)[0]]   
-    def on_message(self, wss, message): # pylint: disable=unused-argument
+    def on_message(self, message): # pylint: disable=unused-argument
         """Method to process websocket messages."""
         logger = logging.getLogger(__name__)
         logger.debug(message)
diff --git a/requirements.txt b/requirements.txt
index d4a2d35a..7c92b1b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 pylint
 requests
-websocket-client==0.47
\ No newline at end of file
+websocket-client==0.56
\ No newline at end of file
diff --git a/setup.py b/setup.py
index a272a33d..0ec3cb7a 100644
--- a/setup.py
+++ b/setup.py
@@ -3,9 +3,9 @@
 
 setup(
     name="iqoptionapi",
-    version="3.9.8",
+    version="4.0.0",
     packages=find_packages(),
-    install_requires=["pylint","requests","websocket-client==0.47"],
+    install_requires=["pylint","requests","websocket-client==0.56"],
     include_package_data = True,
     description="Best IQ Option API for python",
     long_description="Best IQ Option API for python",