diff --git a/unique_uuid.py b/unique_uuid.py
index 349447d..74be30a 100755
--- a/unique_uuid.py
+++ b/unique_uuid.py
@@ -3,8 +3,9 @@
 
 from glob import glob
 import json
+from typing import Dict
 
-all_uuids = {}
+all_uuids: Dict[str, str] = {}
 for definition in glob('./objects/*/definition.json'):
     with open(definition, 'r') as f:
         d = json.load(f)