diff --git a/python/hypy/hydrolocation/hydrolocation.py b/python/hypy/hydrolocation/hydrolocation.py
index 3ec3e16..ee63a8f 100644
--- a/python/hypy/hydrolocation/hydrolocation.py
+++ b/python/hypy/hydrolocation/hydrolocation.py
@@ -52,7 +52,7 @@ def __init__(self,
 
         Parameters
         ----------
-        shape: Union[Point, Tuple]
+        shape: Point | Tuple
             a shapely point geometry or two-tuple defining the coordinates of this location
         type: HydroLocationType
             enum value defining the type of feature at this location