diff --git a/layouts/_default/list.html b/layouts/_default/list.html
index a864d50..23bfc1e 100644
--- a/layouts/_default/list.html
+++ b/layouts/_default/list.html
@@ -47,7 +47,7 @@ <h1 class="text-white mb-4">{{ .Params.title }}</h1>
 
   {{ "<!-- details page -->" | safeHTML }}
   <section class="single section bg-gray pb-0">
-    <div class="container-fluid">
+    <div class="container">
       <div class="row">
         <div class="col-lg-3">
           <div class="mb-5 bg-white p-4 sticky-top">
diff --git a/layouts/_default/single.html b/layouts/_default/single.html
index 4c9ef1a..6a72a22 100644
--- a/layouts/_default/single.html
+++ b/layouts/_default/single.html
@@ -10,7 +10,7 @@
 
 <!-- details page -->
 <section class="single pt-5 bg-gray">
-  <div class="container-fluid">
+  <div class="container">
     <div class="row">
       <div class="col-lg-3">
         <div class="p-4 bg-white sticky-top top-100">