diff --git a/addon/ui.py b/addon/ui.py
index 26d08e6..fc98992 100644
--- a/addon/ui.py
+++ b/addon/ui.py
@@ -342,7 +342,7 @@ class IMAGE_EDITOR_PLUS_OT_offset_dialog(bpy.types.Operator):
 
         IMAGE_EDITOR_PLUS_OffsetPropertyGroup.offset_y = \
                 bpy.props.IntProperty(name='Offset Y', subtype='FACTOR',
-                min=-width + 1, max=width - 1)
+                min=-height + 1, max=height - 1)
 
         update_offset_properties(self, context)