diff --git a/tosca-package/tosca/yaml2python.py b/tosca-package/tosca/yaml2python.py
index 70de1b7b..a3ddc530 100644
--- a/tosca-package/tosca/yaml2python.py
+++ b/tosca-package/tosca/yaml2python.py
@@ -283,7 +283,7 @@ def find_repository(self, name) -> Tuple[str, str]:
 
 
 
-    def convert_import(self, imp: dict[str, str]) -> Tuple[str, str]:
+    def convert_import(self, imp: Dict[str, str]) -> Tuple[str, str]:
         "converts tosca yaml import dict (as `imp`) to python import statement"
         repo = imp.get("repository")
         file = imp.get("file")