diff --git a/INSTALLATION.md b/INSTALLATION.md
index 63d860b0..c3ab6e0e 100644
--- a/INSTALLATION.md
+++ b/INSTALLATION.md
@@ -1369,4 +1369,5 @@ define( 'CONSTANT_NAME', value );
 | FICTIONEER_ENABLE_STORY_CHANGELOG | boolean | Whether changes to the story chapter list should be logged. Default `true`.
 | FICTIONEER_ENABLE_BROWSER_NOTES | boolean | Whether to inform visitors of missing browser features. Default `true`.
 | FICTIONEER_DEFER_SCRIPTS | boolean | Whether to defer scripts or load them in the footer. Default `true`.
+| FICTIONEER_ENABLE_ASYNC_ONLOAD_PATTERN | boolean | Whether the [onload pattern](https://www.filamentgroup.com/lab/load-css-simpler/) for asynchronous CSS loading is used. Default `true`.
 | FICTIONEER_EXAMPLE_CHAPTER_ICONS | array | Collection of example Font Awesome icon class strings.
diff --git a/functions.php b/functions.php
index 4fd6de33..56e2a913 100644
--- a/functions.php
+++ b/functions.php
@@ -386,6 +386,11 @@ if ( ! defined( 'FICTIONEER_DEFER_SCRIPTS' ) ) {
   define( 'FICTIONEER_DEFER_SCRIPTS', true );
 }
 
+// Boolean: Asynchronous loading via onload pattern
+if ( ! defined( 'FICTIONEER_ENABLE_ASYNC_ONLOAD_PATTERN' ) ) {
+  define( 'FICTIONEER_ENABLE_ASYNC_ONLOAD_PATTERN', true );
+}
+
 /*
  * Arrays
  */
diff --git a/includes/functions/_theme_setup.php b/includes/functions/_theme_setup.php
index ce295bb2..55fa3313 100644
--- a/includes/functions/_theme_setup.php
+++ b/includes/functions/_theme_setup.php
@@ -1262,10 +1262,15 @@ if ( ! function_exists( 'fictioneer_output_head_fonts' ) ) {
     // Critical path fonts
     fictioneer_output_critical_fonts();
 
-    // Bundled fonts
+    // Setup
     $bundled_fonts = WP_CONTENT_DIR . '/themes/fictioneer/cache/bundled-fonts.css';
     $last_built_timestamp = get_option( 'fictioneer_bundled_fonts_timestamp', '123456789' );
     $cache_bust = "?timestamp={$last_built_timestamp}";
+    $loading_pattern = '';
+
+    if ( FICTIONEER_ENABLE_ASYNC_ONLOAD_PATTERN ) {
+      $loading_pattern = 'media="print" onload="this.media=\'all\'; this.onload=null;"';
+    }
 
     // Create file if it does not exist
     if ( ! file_exists( $bundled_fonts ) ) {
@@ -1279,9 +1284,9 @@ if ( ! function_exists( 'fictioneer_output_head_fonts' ) ) {
       $custom_fonts_href = get_template_directory_uri() . '/cache/bundled-fonts.css' . $cache_bust;
 
       // Start HTML ---> ?>
-      <link rel="stylesheet" id="base-fonts-stylesheet" href="<?php echo $base_fonts_href; ?>" data-no-optimize="1" media="print" onload="this.media='all';">
+      <link rel="stylesheet" id="base-fonts-stylesheet" href="<?php echo $base_fonts_href; ?>" data-no-optimize="1" data-no-minify="1" <?php echo $loading_pattern; ?>>
       <noscript><link rel="stylesheet" href="<?php echo $base_fonts_href; ?>"></noscript>
-      <link rel="stylesheet" id="bundled-fonts-stylesheet" href="<?php echo $custom_fonts_href; ?>" data-no-optimize="1" media="print" onload="this.media='all';">
+      <link rel="stylesheet" id="bundled-fonts-stylesheet" href="<?php echo $custom_fonts_href; ?>" data-no-optimize="1" data-no-minify="1" <?php echo $loading_pattern; ?>>
       <noscript><link rel="stylesheet" href="<?php echo $custom_fonts_href; ?>"></noscript>
       <?php // <--- End HTML
     } else {
@@ -1289,7 +1294,7 @@ if ( ! function_exists( 'fictioneer_output_head_fonts' ) ) {
       $full_fonts_href = get_template_directory_uri() . '/css/fonts-full.css' . $cache_bust;
 
       // Start HTML ---> ?>
-      <link rel="stylesheet" href="<?php echo $full_fonts_href; ?>" data-no-optimize="1" media="print" onload="this.media='all';">
+      <link rel="stylesheet" href="<?php echo $full_fonts_href; ?>" data-no-optimize="1" data-no-minify="1" <?php echo $loading_pattern; ?>>
       <noscript><link rel="stylesheet" href="<?php echo $full_fonts_href; ?>"></noscript>
       <?php // <--- End HTML
     }