diff --git a/src/qrules/conservation_rules.py b/src/qrules/conservation_rules.py
index d627a8d2..2cb7ddce 100644
--- a/src/qrules/conservation_rules.py
+++ b/src/qrules/conservation_rules.py
@@ -75,15 +75,13 @@ def _is_particle_antiparticle_pair(pid1: int, pid2: int) -> bool:
 
 
 class GraphElementRule(Protocol):
-    def __call__(self, __qns: Any) -> bool:
-        ...
+    def __call__(self, __qns: Any) -> bool: ...
 
 
 class EdgeQNConservationRule(Protocol):
     def __call__(
         self, __ingoing_edge_qns: List[Any], __outgoing_edge_qns: List[Any]
-    ) -> bool:
-        ...
+    ) -> bool: ...
 
 
 class ConservationRule(Protocol):
@@ -92,8 +90,7 @@ def __call__(
         __ingoing_edge_qns: List[Any],
         __outgoing_edge_qns: List[Any],
         __node_qns: Any,
-    ) -> bool:
-        ...
+    ) -> bool: ...
 
 
 # Note a generic would be more fitting here. However the type annotations of
diff --git a/src/qrules/topology.py b/src/qrules/topology.py
index d8490790..2fad0463 100644
--- a/src/qrules/topology.py
+++ b/src/qrules/topology.py
@@ -62,8 +62,7 @@
 
 class _Comparable(Protocol):
     @abstractmethod
-    def __lt__(self, other: Any) -> bool:
-        ...
+    def __lt__(self, other: Any) -> bool: ...
 
 
 KT = TypeVar("KT", bound=_Comparable)
@@ -875,28 +874,24 @@ def unfreeze(self) -> "MutableTransition[EdgeType, NodeType]":
         return MutableTransition(self.topology, self.states, self.interactions)
 
     @overload
-    def convert(self) -> "FrozenTransition[EdgeType, NodeType]":
-        ...
+    def convert(self) -> "FrozenTransition[EdgeType, NodeType]": ...
 
     @overload
     def convert(
         self, state_converter: Callable[[EdgeType], NewEdgeType]
-    ) -> "FrozenTransition[NewEdgeType, NodeType]":
-        ...
+    ) -> "FrozenTransition[NewEdgeType, NodeType]": ...
 
     @overload
     def convert(
         self, *, interaction_converter: Callable[[NodeType], NewNodeType]
-    ) -> "FrozenTransition[EdgeType, NewNodeType]":
-        ...
+    ) -> "FrozenTransition[EdgeType, NewNodeType]": ...
 
     @overload
     def convert(
         self,
         state_converter: Callable[[EdgeType], NewEdgeType],
         interaction_converter: Callable[[NodeType], NewNodeType],
-    ) -> "FrozenTransition[NewEdgeType, NewNodeType]":
-        ...
+    ) -> "FrozenTransition[NewEdgeType, NewNodeType]": ...
 
     def convert(self, state_converter=None, interaction_converter=None):  # type: ignore[no-untyped-def]
         """Cast the edge and/or node properties to another type."""
diff --git a/src/qrules/transition.py b/src/qrules/transition.py
index 04b51bcf..0c881707 100644
--- a/src/qrules/transition.py
+++ b/src/qrules/transition.py
@@ -379,12 +379,10 @@ def add_final_state_grouping(
     @overload
     def get_allowed_interaction_types(
         self,
-    ) -> Union[List[InteractionType], Dict[int, List[InteractionType]]]:
-        ...
+    ) -> Union[List[InteractionType], Dict[int, List[InteractionType]]]: ...
 
     @overload
-    def get_allowed_interaction_types(self, node_id: int) -> List[InteractionType]:
-        ...
+    def get_allowed_interaction_types(self, node_id: int) -> List[InteractionType]: ...
 
     def get_allowed_interaction_types(self, node_id=None):  # type: ignore[no-untyped-def]
         if node_id is None: