diff --git a/spinn_utilities/ranged/abstract_view.py b/spinn_utilities/ranged/abstract_view.py
index 7f626254..8fd86229 100644
--- a/spinn_utilities/ranged/abstract_view.py
+++ b/spinn_utilities/ranged/abstract_view.py
@@ -37,7 +37,8 @@ def __init__(self, range_dict: RangeDictionary[T]):
         """
         self._range_dict = range_dict
 
-    def __getitem__(self, key: Union[int, slice, Iterable[int]]):
+    def __getitem__(self, key: Union[int, slice, Iterable[int]]
+                    ) -> AbstractView[T]:
         """
         Support for the view[x] based the type of the key
 
@@ -64,7 +65,7 @@ def __getitem__(self, key: Union[int, slice, Iterable[int]]):
             return self._range_dict.view_factory(ids[key])
         return self._range_dict.view_factory([ids[i] for i in key])
 
-    def __setitem__(self, key: str, value: T):
+    def __setitem__(self, key: str, value: T) -> None:
         """
         See :py:meth:`AbstractDict.set_value`
 
diff --git a/spinn_utilities/ranged/ids_view.py b/spinn_utilities/ranged/ids_view.py
index ec3d9962..4b6de1b3 100644
--- a/spinn_utilities/ranged/ids_view.py
+++ b/spinn_utilities/ranged/ids_view.py
@@ -71,7 +71,7 @@ def set_value(
         for _id in self._ids:
             ranged_list.set_value_by_id(the_id=_id, value=value)
 
-    def set_value_by_ids(self, key: str, ids: Iterable[int], value: T):
+    def set_value_by_ids(self, key: str, ids: Iterable[int], value: T) -> None:
         """
         Sets a already existing key to the new value. For the view specified.
 
@@ -84,7 +84,8 @@ def set_value_by_ids(self, key: str, ids: Iterable[int], value: T):
             rl.set_value_by_id(the_id=_id, value=value)
 
     @overload
-    def iter_all_values(self, key: str, update_safe=False) -> Iterator[T]:
+    def iter_all_values(
+            self, key: str, update_safe: bool = False) -> Iterator[T]:
         ...
 
     @overload
diff --git a/spinn_utilities/ranged/single_view.py b/spinn_utilities/ranged/single_view.py
index 08498715..b2412a85 100644
--- a/spinn_utilities/ranged/single_view.py
+++ b/spinn_utilities/ranged/single_view.py
@@ -64,13 +64,14 @@ def get_value(self, key: _Keys) -> Union[T, Dict[str, T]]:
                 for k in key}
 
     @overload
-    def iter_all_values(self, key: str, update_safe=False) -> Iterator[T]:
+    def iter_all_values(self, key: str, update_safe: bool = False
+                        ) -> Iterator[T]:
         ...
 
     @overload
     def iter_all_values(
-            self, key: Optional[_StrSeq], update_safe=False) -> Iterator[
-                Dict[str, T]]:
+            self, key: Optional[_StrSeq], update_safe: bool = False
+            ) -> Iterator[Dict[str, T]]:
         ...
 
     @overrides(AbstractDict.iter_all_values)
diff --git a/spinn_utilities/ranged/slice_view.py b/spinn_utilities/ranged/slice_view.py
index c0a94ea9..42afdb77 100644
--- a/spinn_utilities/ranged/slice_view.py
+++ b/spinn_utilities/ranged/slice_view.py
@@ -78,13 +78,13 @@ def update_safe_iter_all_values(self, key: str) -> Iterator[T]:
 
     @overload
     def iter_all_values(
-            self, key: str, update_safe=False) -> Iterator[T]:
+            self, key: str, update_safe: bool = False) -> Iterator[T]:
         ...
 
     @overload
     def iter_all_values(
             self, key: Optional[_StrSeq] = None,
-            update_safe=False) -> Iterator[Dict[str, T]]:
+            update_safe: bool = False) -> Iterator[Dict[str, T]]:
         ...
 
     @overrides(AbstractDict.iter_all_values, extend_defaults=True)