diff --git a/my/core/cfg.py b/my/core/cfg.py
index 3321a4c..3cddcf7 100644
--- a/my/core/cfg.py
+++ b/my/core/cfg.py
@@ -18,7 +18,7 @@ def make_config(cls: Type[C], migration: Callable[[Attrs], Attrs]=lambda x: x) -
     params = {
         k: v
         for k, v in new_props.items()
-        if k in {f.name for f in fields(cls)}
+        if k in {f.name for f in fields(cls)}   # type: ignore[arg-type]  # see https://github.com/python/typing_extensions/issues/115
     }
     # todo maybe return type here?
     return cls(**params) # type: ignore[call-arg]
diff --git a/my/core/freezer.py b/my/core/freezer.py
index abb2973..649a2b7 100644
--- a/my/core/freezer.py
+++ b/my/core/freezer.py
@@ -8,7 +8,7 @@ D = TypeVar('D')
 
 
 def _freeze_dataclass(Orig: Type[D]):
-    ofields = [(f.name, f.type, f) for f in dcl.fields(Orig)]
+    ofields = [(f.name, f.type, f) for f in dcl.fields(Orig)]   # type: ignore[arg-type]  # see https://github.com/python/typing_extensions/issues/115
 
     # extract properties along with their types
     props   = list(inspect.getmembers(Orig, lambda o: isinstance(o, property)))
@@ -35,7 +35,7 @@ class Freezer(Generic[D]):
 
     def freeze(self, value: D) -> D:
         pvalues = {name: getattr(value, name) for name, _ in self.props}
-        return self.Frozen(**dcl.asdict(value), **pvalues)
+        return self.Frozen(**dcl.asdict(value), **pvalues)  # type: ignore[call-overload]  # see https://github.com/python/typing_extensions/issues/115
 
 
 ### tests