diff --git a/client/ayon_core/pipeline/workfile/workfile_template_builder.py b/client/ayon_core/pipeline/workfile/workfile_template_builder.py
index 9994bcfd4e..e2add99752 100644
--- a/client/ayon_core/pipeline/workfile/workfile_template_builder.py
+++ b/client/ayon_core/pipeline/workfile/workfile_template_builder.py
@@ -16,6 +16,7 @@ import re
 import collections
 import copy
 from abc import ABC, abstractmethod
+from typing import Optional
 
 import ayon_api
 from ayon_api import (