diff --git a/index.html b/index.html
index d61306fa..cd81ce1b 100644
--- a/index.html
+++ b/index.html
@@ -48,7 +48,7 @@
         font-family: "Mona Sans";
         src: url("/font/Mona-Sans.woff2") format("woff2 supports variations"),
           url("/font/Mona-Sans.woff2") format("woff2-variations");
-        font-weight: 200 500;
+        font-weight: 200 500 600;
         font-stretch: 75% 125%;
         font-display: swap;
       }