diff --git a/invokeai/app/services/invocation_services.py b/invokeai/app/services/invocation_services.py
index 41654168d6..a85089554c 100644
--- a/invokeai/app/services/invocation_services.py
+++ b/invokeai/app/services/invocation_services.py
@@ -1,9 +1,9 @@
 # Copyright (c) 2022 Kyle Schouviller (https://github.com/kyle0654) and the InvokeAI Team
-
+from typing import TYPE_CHECKING
 from logging import Logger
+
 from invokeai.app.services.images import ImageService
 from invokeai.backend import ModelManager
-
 from .events import EventServiceBase
 from .latent_storage import LatentsStorageBase
 from .image_file_storage import ImageFileStorageBase
@@ -13,6 +13,11 @@ from .item_storage import ItemStorageABC
 from .config import InvokeAISettings
 
 
+if TYPE_CHECKING:
+    from invokeai.app.services.graph import GraphExecutionState, LibraryGraph
+    from invokeai.app.services.invoker import InvocationProcessorABC
+
+
 class InvocationServices:
     """Services that can be used by invocations"""