diff --git a/docforge/model/object.py b/docforge/model/object.py
index 9181fe5..8edb79c 100644
--- a/docforge/model/object.py
+++ b/docforge/model/object.py
@@ -17,13 +17,13 @@ class DocObject:
         self.path = path
         self.signature = signature
         self.docstring = docstring
-        self.members: Dict[str, DocObject] = {}
+        self.members: Dict[str, 'DocObject'] = {}
 
-    def add_member(self, obj: DocObject) -> None:
+    def add_member(self, obj: 'DocObject') -> None:
         self.members[obj.name] = obj
 
-    def get_member(self, name: str) -> DocObject:
+    def get_member(self, name: str) -> 'DocObject':
         return self.members[name]
 
-    def get_all_members(self) -> Iterable[DocObject]:
+    def get_all_members(self) -> Iterable['DocObject']:
         return self.members.values()