diff --git a/src/pystencilssfg/__init__.py b/src/pystencilssfg/__init__.py
index 1ee4eaee9df05fc447c990bde3a889066675d850..7fa3378c7958c13f4fb526eb67a2bd08335400f5 100644
--- a/src/pystencilssfg/__init__.py
+++ b/src/pystencilssfg/__init__.py
@@ -15,4 +15,5 @@ __all__ = [
 ]
 
 from . import _version
-__version__ = _version.get_versions()['version']
+
+__version__ = _version.get_versions()["version"]
diff --git a/src/pystencilssfg/composer/basic_composer.py b/src/pystencilssfg/composer/basic_composer.py
index 4bdf8b30cc8cf7043d862b72af8d5f2b1f27c227..1373f1cb43e9609fee7d34be5c1ca1abb5785b66 100644
--- a/src/pystencilssfg/composer/basic_composer.py
+++ b/src/pystencilssfg/composer/basic_composer.py
@@ -366,7 +366,7 @@ class SfgBasicComposer(SfgIComposer):
 
         def parse_args(*args: ExprLike):
             args_str = ", ".join(str(arg) for arg in args)
-            deps = reduce(set.union, (depends(arg) for arg in args), set())
+            deps: set[SfgVar] = reduce(set.union, (depends(arg) for arg in args), set())
             return SfgStatements(
                 f"{lhs_var.dtype} {lhs_var.name} {{ {args_str} }};",
                 (lhs_var,),
@@ -581,6 +581,7 @@ class SfgBranchBuilder(SfgNodeBuilder):
 
 class SfgSwitchBuilder(SfgNodeBuilder):
     """Builder for C++ switches."""
+
     def __init__(self, switch_arg: ExprLike):
         self._switch_arg = switch_arg
         self._cases: dict[str, SfgSequence] = dict()
diff --git a/src/pystencilssfg/ir/source_components.py b/src/pystencilssfg/ir/source_components.py
index 5007851eeb9027ef025c5e46c3d6da4c019cf2c0..8a4e90967d74aabc4f50529c7ff0e51c76a3d869 100644
--- a/src/pystencilssfg/ir/source_components.py
+++ b/src/pystencilssfg/ir/source_components.py
@@ -550,9 +550,7 @@ class SfgClass:
         self, visibility: SfgVisibility | None = None
     ) -> Generator[SfgMethod, None, None]:
         if visibility is not None:
-            yield from filter(
-                lambda m: m.visibility == visibility, self._methods
-            )
+            yield from filter(lambda m: m.visibility == visibility, self._methods)
         else:
             yield from self._methods