diff --git a/assets/css/mark.css b/assets/css/mark.css
index 3a68d39..8a3eae2 100644
--- a/assets/css/mark.css
+++ b/assets/css/mark.css
@@ -4,7 +4,8 @@ layout: none
 
 @font-face {
     font-family: 'IBM'; 
-    src: url('{{site.baseurl}}/assets/fonts/Px437_VTech_BIOS.ttf') format('truetype'); 
+    src: url('{{site.baseurl}}/assets/fonts/Px437_VTech_BIOS.ttf') format('truetype');
+    /* font from: https://int10h.org/oldschool-pc-fonts/fontlist/#pc6300 */ 
 }
 
 * {