diff --git a/themes/aurelia-theme/layouts/_default/single.html b/themes/aurelia-theme/layouts/_default/single.html
index 54299ee..c8e586f 100644
--- a/themes/aurelia-theme/layouts/_default/single.html
+++ b/themes/aurelia-theme/layouts/_default/single.html
@@ -3,7 +3,7 @@
 {{ partial "page-header" . }}
 
 <section class="py-4 bg-white">
-  <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+  <div class="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8">
     {{ if .Params.toc }}
     <div class="lg:grid lg:grid-cols-8 lg:gap-8">
       <!-- Main Content -->