diff --git a/app/api/todos.py b/app/api/todos.py
index 77bd0b4..bde3092 100644
--- a/app/api/todos.py
+++ b/app/api/todos.py
@@ -78,10 +78,12 @@ def delete_todo(
     todo_id: int, 
     db: Session = Depends(get_db),
     current_user: User = Depends(get_current_active_user)
-):
+) -> None:
     """
     Delete a todo item for the current user.
     """
     success = todo_crud.delete_todo(db, todo_id=todo_id, owner_id=current_user.id)
     if not success:
-        raise HTTPException(status_code=404, detail="Todo not found")
\ No newline at end of file
+        raise HTTPException(status_code=404, detail="Todo not found")
+    # Explicitly return None for 204 response
+    return None
\ No newline at end of file
diff --git a/app/api/users.py b/app/api/users.py
index 5cfed7f..4842f4d 100644
--- a/app/api/users.py
+++ b/app/api/users.py
@@ -74,7 +74,7 @@ def delete_user_endpoint(
     user_id: int,
     db: Session = Depends(get_db),
     current_user: User = Depends(get_current_active_user),
-):
+) -> None:
     """
     Delete a user.
     """
@@ -87,4 +87,6 @@ def delete_user_endpoint(
     
     success = delete_user(db, user_id=user_id)
     if not success:
-        raise HTTPException(status_code=404, detail="User not found")
\ No newline at end of file
+        raise HTTPException(status_code=404, detail="User not found")
+    # Explicitly return None for 204 response
+    return None
\ No newline at end of file