diff --git a/danmaku2ass.py b/danmaku2ass.py
index fcd39b9..7b87152 100755
--- a/danmaku2ass.py
+++ b/danmaku2ass.py
@@ -545,6 +545,7 @@ WrapStyle: 2
 Collisions: Normal
 PlayResX: %(width)s
 PlayResY: %(height)s
+ScaledBorderAndShadow: yes
 
 [V4+ Styles]
 Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding