diff --git a/manifest.json b/manifest.json
index ba43561..161038f 100644
--- a/manifest.json
+++ b/manifest.json
@@ -5,7 +5,8 @@
 	"id": "/mcalc",
 	"icons": [
 		{
-			"src": "icon.svg"
+			"src": "icon.svg",
+			"sizes": "192x192 512x512"
 		}
 	],
 	"start_url": "/mcalc/index.html",