diff --git a/keycloak/connection.py b/keycloak/connection.py
index 3871482..7d5ed2f 100644
--- a/keycloak/connection.py
+++ b/keycloak/connection.py
@@ -54,9 +54,9 @@ class ConnectionManager(object):
         for protocol in ('https://', 'http://'):
             adapter = HTTPAdapter(max_retries=1)
             # adds POST to retry whitelist
-            method_whitelist = set(adapter.max_retries.method_whitelist)
-            method_whitelist.add('POST')
-            adapter.max_retries.method_whitelist = frozenset(method_whitelist)
+            allowed_methods = set(adapter.max_retries.allowed_methods)
+            allowed_methods.add('POST')
+            adapter.max_retries.allowed_methods = frozenset(allowed_methods)
 
             self._s.mount(protocol, adapter)
 
diff --git a/keycloak/keycloak_admin.py b/keycloak/keycloak_admin.py
index cc6e384..033df55 100644
--- a/keycloak/keycloak_admin.py
+++ b/keycloak/keycloak_admin.py
@@ -77,7 +77,7 @@ class KeycloakAdmin:
         :param realm_name: realm name
         :param client_id: client id
         :param verify: True if want check connection SSL
-        :param client_secret_key: client secret key
+        :param client_secret_key: client secret key (optional, required only for access type confidential)
         :param custom_headers: dict of custom header to pass to each HTML request
         :param user_realm_name: The realm name of the user, if different from realm_name
         :param auto_refresh_token: list of methods that allows automatic token refresh. ex: ['get', 'put', 'post', 'delete']
diff --git a/requirements.txt b/requirements.txt
index d4776e3..f4faf6d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,6 @@
 requests>=2.20.0
 httmock>=1.2.5
 python-jose>=1.4.0
-twine==1.13.0
\ No newline at end of file
+twine==1.13.0
+jose~=1.0.0
+setuptools~=54.2.0
\ No newline at end of file