diff --git a/assets/css/itix.css b/assets/css/itix.css
index a6fc294..d768c46 100644
--- a/assets/css/itix.css
+++ b/assets/css/itix.css
@@ -41,9 +41,7 @@
  */
 @font-face{
   font-family: 'JetBrains Mono';
-  src: url('/fonts/JetBrainsMono-Regular.woff2') format('woff2'),
-    url('/fonts/JetBrainsMono-Regular.woff') format('woff'),
-    url('/fonts/JetBrainsMono-Regular.ttf') format('truetype');
+  src: url('/fonts/JetBrainsMono-Regular.woff2') format('woff2');
   font-weight: 400;
   font-style: normal;
 
@@ -57,7 +55,7 @@
 
 @font-face{
   font-family: 'Source Serif Pro';
-  src: url('/fonts/SourceSerifPro-Regular.ttf') format('truetype');
+  src: url('/fonts/SourceSerifPro-Regular.woff2') format('woff2');
   font-weight: 400;
   font-style: normal;
 
@@ -71,7 +69,7 @@
 
 @font-face{
   font-family: 'Source Sans Pro';
-  src: url('/fonts/SourceSansPro-Regular.ttf') format('truetype');
+  src: url('/fonts/SourceSansPro-Regular.woff2') format('woff2');
   font-weight: 400;
   font-style: normal;
 
diff --git a/layouts/_partials/head.html b/layouts/_partials/head.html
index f3f96ee..adb4bf1 100644
--- a/layouts/_partials/head.html
+++ b/layouts/_partials/head.html
@@ -14,13 +14,11 @@
 <!--
   -- Core Web Vitals / Cumulative Layout Shift.
   --
-  -- Preload all fonts and images to reduce layout shifts.
+  -- Preload the fonts used on every page (body text, menu and toolbar).
+  -- The monospace font is only used by code blocks: it is not preloaded.
   -->
-<link rel="preload" href="/fonts/JetBrainsMono-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
-<link rel="preload" href="/fonts/JetBrainsMono-Regular.woff" as="font" type="font/woff" crossorigin="anonymous">
-<link rel="preload" href="/fonts/JetBrainsMono-Regular.ttf" as="font" type="font/ttf" crossorigin="anonymous">
-<link rel="preload" href="/fonts/SourceSerifPro-Regular.ttf" as="font" type="font/ttf" crossorigin="anonymous">
-<link rel="preload" href="/fonts/SourceSansPro-Regular.ttf" as="font" type="font/ttf" crossorigin="anonymous">
+<link rel="preload" href="/fonts/SourceSerifPro-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
+<link rel="preload" href="/fonts/SourceSansPro-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
 
 <!--
   -- Add a reference to the favicon.ico.
diff --git a/static/fonts/JetBrainsMono-Regular.ttf b/static/fonts/JetBrainsMono-Regular.ttf
deleted file mode 100644
index b06b6e2..0000000
Binary files a/static/fonts/JetBrainsMono-Regular.ttf and /dev/null differ
diff --git a/static/fonts/JetBrainsMono-Regular.woff b/static/fonts/JetBrainsMono-Regular.woff
deleted file mode 100644
index 8d0c65f..0000000
Binary files a/static/fonts/JetBrainsMono-Regular.woff and /dev/null differ
diff --git a/static/fonts/SourceSansPro-Regular.ttf b/static/fonts/SourceSansPro-Regular.ttf
deleted file mode 100644
index b422bf4..0000000
Binary files a/static/fonts/SourceSansPro-Regular.ttf and /dev/null differ
diff --git a/static/fonts/SourceSansPro-Regular.woff2 b/static/fonts/SourceSansPro-Regular.woff2
new file mode 100644
index 0000000..7b67897
Binary files /dev/null and b/static/fonts/SourceSansPro-Regular.woff2 differ
diff --git a/static/fonts/SourceSerifPro-Regular.ttf b/static/fonts/SourceSerifPro-Regular.ttf
deleted file mode 100644
index e6c5dff..0000000
Binary files a/static/fonts/SourceSerifPro-Regular.ttf and /dev/null differ
diff --git a/static/fonts/SourceSerifPro-Regular.woff2 b/static/fonts/SourceSerifPro-Regular.woff2
new file mode 100644
index 0000000..585b497
Binary files /dev/null and b/static/fonts/SourceSerifPro-Regular.woff2 differ
diff --git a/static/fonts/material-icons.ttf b/static/fonts/material-icons.ttf
deleted file mode 100644
index a7c4999..0000000
Binary files a/static/fonts/material-icons.ttf and /dev/null differ
diff --git a/static/fonts/material-icons.woff2 b/static/fonts/material-icons.woff2
deleted file mode 100644
index 84084a5..0000000
Binary files a/static/fonts/material-icons.woff2 and /dev/null differ