diff --git a/flake.nix b/flake.nix
index 165ccbb..40b92a3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -21,7 +21,7 @@
     in
       with pkgs; {
         devShell = mkShell {
-          buildInputs = [nodejs yarn watchman alejandra nodePackages.prettier just protobuf];
+          buildInputs = [nodejs yarn watchman alejandra nodePackages.prettier just protobuf black];
         };
       });
 }
diff --git a/rbproto/python/shot_pb2.pyi b/rbproto/python/shot_pb2.pyi
index b5ec083..f149ece 100644
--- a/rbproto/python/shot_pb2.pyi
+++ b/rbproto/python/shot_pb2.pyi
@@ -102,7 +102,6 @@ class CollisionInfo(_message.Message):
             key: _Optional[int] = ...,
             value: _Optional[_Union[Point, _Mapping]] = ...,
         ) -> None: ...
-
     SOURCE_FIELD_NUMBER: _ClassVar[int]
     BALL_IDENTIFIERS_FIELD_NUMBER: _ClassVar[int]
     WALL_IDENTIFIER_FIELD_NUMBER: _ClassVar[int]