diff --git a/src/frformat/custom_format.py b/src/frformat/custom_format.py
index 9d49e9b..e14e234 100644
--- a/src/frformat/custom_format.py
+++ b/src/frformat/custom_format.py
@@ -19,8 +19,7 @@ class CustomFormat(ABC, Generic[ValueType]):
     formatter: Formatter = DefaultFormatter[ValueType]()
 
     @abstractmethod
-    def is_valid(self, value: ValueType) -> bool:
-        ...
+    def is_valid(self, value: ValueType) -> bool: ...
 
     def format(self, value: ValueType) -> str:
         if not self.is_valid(value):
diff --git a/src/frformat/formatter.py b/src/frformat/formatter.py
index b98e87d..dd28666 100644
--- a/src/frformat/formatter.py
+++ b/src/frformat/formatter.py
@@ -7,8 +7,7 @@
 
 
 class Formatter(Protocol, Generic[ValueType]):
-    def format(self, value: ValueType) -> str:
-        ...
+    def format(self, value: ValueType) -> str: ...
 
 
 class DefaultFormatter(Generic[ValueType]):
diff --git a/src/frformat/versioned_set.py b/src/frformat/versioned_set.py
index 34f5d18..165a84c 100644
--- a/src/frformat/versioned_set.py
+++ b/src/frformat/versioned_set.py
@@ -16,8 +16,7 @@
 
 
 class Version(Protocol):
-    def get_id(self) -> str:
-        ...
+    def get_id(self) -> str: ...
 
     @classmethod
     def is_sorted(cls) -> bool:
@@ -32,23 +31,17 @@ class _SortableVersion(Version, Protocol):
     """A version subclass that is sortable
     For type checking purposes only"""
 
-    def __lt__(self, v) -> bool:
-        ...
+    def __lt__(self, v) -> bool: ...
 
-    def __le__(self, v) -> bool:
-        ...
+    def __le__(self, v) -> bool: ...
 
-    def __gt__(self, v) -> bool:
-        ...
+    def __gt__(self, v) -> bool: ...
 
-    def __ge__(self, v) -> bool:
-        ...
+    def __ge__(self, v) -> bool: ...
 
-    def __eq__(self, v) -> bool:
-        ...
+    def __eq__(self, v) -> bool: ...
 
-    def __ne__(self, v) -> bool:
-        ...
+    def __ne__(self, v) -> bool: ...
 
 
 class VersionedSet(Generic[V]):