diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9bac0ec..a6f6341 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -12,7 +12,7 @@ repos:
           - id: pretty-format-json
             args: ["--autofix"]
     - repo: https://github.com/PyCQA/isort
-      rev: 5.10.1
+      rev: 5.12.0
       hooks:
           - id: isort
             args: ["--profile", "black"]
diff --git a/easyauth/server.py b/easyauth/server.py
index 9db2945..d14efa8 100755
--- a/easyauth/server.py
+++ b/easyauth/server.py
@@ -961,11 +961,13 @@ async def mock_function(*args, **kwargs):
 
         return auth_endpoint
 
-    def parse_permissions(self, users, groups, roles, actions, default_permissions):
+    def parse_permissions(
+        self, users, groups, roles, actions, default_permissions=None
+    ):
         """
-        returns permssions defined on a given endpoint if set
+        returns permissions defined on a given endpoint if set
         if unset
-            returns router dedfault permissions
+            returns router default permissions
         if no router defaults
             return EasyAuthServer default permissions
         """