diff --git a/src/cpl-dependency/cpl/dependency/inject.py b/src/cpl-dependency/cpl/dependency/inject.py
index f49579af..3e6b915f 100644
--- a/src/cpl-dependency/cpl/dependency/inject.py
+++ b/src/cpl-dependency/cpl/dependency/inject.py
@@ -10,6 +10,7 @@ def inject(f=None):
         return functools.partial(inject)
 
     if iscoroutinefunction(f):
+
         @functools.wraps(f)
         async def async_inner(*args, **kwargs):
             from cpl.dependency.service_provider import ServiceProvider
diff --git a/src/cpl-dependency/cpl/dependency/service_provider.py b/src/cpl-dependency/cpl/dependency/service_provider.py
index 0be72c42..180ad4cc 100644
--- a/src/cpl-dependency/cpl/dependency/service_provider.py
+++ b/src/cpl-dependency/cpl/dependency/service_provider.py
@@ -43,7 +43,7 @@ class ServiceProvider:
     def _get_service(self, parameter: Parameter, origin_service_type: type = None) -> Optional[object]:
         for descriptor in self._service_descriptors:
             if descriptor.service_type == parameter.annotation or issubclass(
-                    descriptor.service_type, parameter.annotation
+                descriptor.service_type, parameter.annotation
             ):
                 if descriptor.implementation is not None:
                     return descriptor.implementation