diff --git a/aiogoogle/__version__.py b/aiogoogle/__version__.py
index 9ea6da9..5135ebf 100644
--- a/aiogoogle/__version__.py
+++ b/aiogoogle/__version__.py
@@ -2,7 +2,7 @@
 __about__ = "Async Google API client"
 __description__ = __about__
 __url__ = "https://github.com/omarryhan/aiogoogle"
-__version_info__ = ("2", "1", "0")
+__version_info__ = ("2", "1", "1")
 __version__ = ".".join(__version_info__)
 __author__ = "Omar Ryhan"
 __author_email__ = "omarryhan@gmail.com"
diff --git a/aiogoogle/auth/managers.py b/aiogoogle/auth/managers.py
index eb07110..eb9ff70 100644
--- a/aiogoogle/auth/managers.py
+++ b/aiogoogle/auth/managers.py
@@ -403,8 +403,7 @@ def authorization_url(
             (str): An Authorization URI
         """
         client_creds = client_creds or self.client_creds
-        scopes = scopes or client_creds["scopes"]
-        scopes = " ".join(client_creds["scopes"])
+        scopes = " ".join(scopes or client_creds["scopes"])
         uri = (
             self["authorization_endpoint"]
             + f'?redirect_uri={client_creds["redirect_uri"]}&scope={scopes}&'
@@ -414,13 +413,12 @@ def authorization_url(
             "response_type": response_type,
             "state": state,
             "access_type": access_type,
-            "include_granted_scopes": json.dumps(include_granted_scopes),
+            "include_granted_scopes": include_granted_scopes,
             "login_hint": login_hint,
             "prompt": prompt,
         }.items():
             if param is not None:
-                uri += "&"
-                uri += parse.urlencode({param_name: param})
+                uri += f"&{parse.urlencode({param_name: json.dumps(param) if isinstance(param, bool) else param})}"
         return uri
 
     async def build_user_creds(
@@ -980,13 +978,12 @@ def authorization_url(
             "response_type": response_type,
             "state": state,
             "access_type": access_type,
-            "include_granted_scopes": json.dumps(include_granted_scopes),
+            "include_granted_scopes": include_granted_scopes,
             "login_hint": login_hint,
             "prompt": prompt,
         }.items():
             if param is not None:
-                uri += "&"
-                uri += parse.urlencode({param_name: param})
+                uri += f"&{parse.urlencode({param_name: json.dumps(param) if isinstance(param, bool) else param})}"
         return uri
 
     async def build_user_creds(