diff --git a/serviceContainer.py b/serviceContainer.py
index b11b0ed..b8e0677 100644
--- a/serviceContainer.py
+++ b/serviceContainer.py
@@ -5,7 +5,7 @@ T = TypeVar("T")
 
 @dataclass
 class ServiceContainer:
-    _dependencies: Mapping[str, T] = {}
+    _dependencies: Mapping[str, T]
 
     def register(self, name: str, instance: T) -> None:
         self._dependencies[name] = instance