diff --git a/src/ukify/mypy.ini b/src/ukify/mypy.ini
index bae4e70f44e..c9836169c10 100644
--- a/src/ukify/mypy.ini
+++ b/src/ukify/mypy.ini
@@ -1,8 +1,9 @@
 [mypy]
 python_version = 3.9
-allow_redefinition = True
 # belonging to --strict
 warn_unused_configs = true
+disallow_any_generics = true
+disallow_subclassing_any = true
 disallow_untyped_calls = true
 disallow_untyped_defs = true
 disallow_untyped_decorators = true
diff --git a/src/ukify/ukify.py b/src/ukify/ukify.py
index ebb4985cfcb..f0d7ee60b78 100755
--- a/src/ukify/ukify.py
+++ b/src/ukify/ukify.py
@@ -20,6 +20,7 @@
 # pylint: disable=unnecessary-lambda-assignment
 
 import argparse
+import builtins
 import collections
 import configparser
 import contextlib
@@ -1386,9 +1387,9 @@ class ConfigItem:
     name: Union[str, tuple[str, str]]
     dest: Optional[str] = None
     metavar: Optional[str] = None
-    type: Optional[Callable] = None
+    type: Optional[Callable[[str], Any]] = None
     nargs: Optional[str] = None
-    action: Optional[Union[str, Callable]] = None
+    action: Optional[Union[str, Callable[[str], Any], builtins.type[argparse.Action]]] = None
     default: Any = None
     version: Optional[str] = None
     choices: Optional[tuple[str, ...]] = None