switch to IBM Plex Sans because it's way better

src/css/color.scss

@@ -1,7 +1,7 @@
 body {
 	background-color:#333333;
 	color: white;
-	font-family: 'Source Sans Pro', sans-serif;
+	font-family: 'IBM Plex Sans', sans-serif;
 }
 pre {
 	background-color: #333333 !important;

src/css/font.scss

@@ -5,7 +5,7 @@
   src: url('/fonts/mono.ttf') format('truetype');
 }
 @font-face {
-  font-family: 'Source Sans Pro';
+  font-family: 'IBM Plex Sans';
   font-style: normal;
   font-weight: 400;
   src: url('/fonts/sans.ttf') format('truetype');