diff --git a/shieldlib/src/screen_gfx.ts b/shieldlib/src/screen_gfx.ts
index e3fe2b55c..525edfe40 100644
--- a/shieldlib/src/screen_gfx.ts
+++ b/shieldlib/src/screen_gfx.ts
@@ -4,7 +4,7 @@ import rgba from "color-rgba";
 
 const defaultFontFamily = '"sans-serif-condensed", "Arial Narrow", sans-serif';
 export const shieldFont = (size: number, fontFamily: string) =>
-  `bold ${size}px ${fontFamily || defaultFontFamily}`;
+  `500 ${size}px ${fontFamily || defaultFontFamily}`;
 export const fontSizeThreshold = 12;
 
 // Replaces `sourceVal` with a blend of `lightenVal` and `darkenVal` proportional to the brightness;