diff --git a/checker/types.py b/checker/types.py
index 3d31011..db1a067 100644
--- a/checker/types.py
+++ b/checker/types.py
@@ -1,4 +1,7 @@
-def try_float(value: str) -> int | float | str:
+from typing import Union
+
+
+def try_float(value: str) -> Union[int, float, str]:
     try:
         return float(value)
     except: