diff --git a/_assets/css/main.scss b/_assets/css/main.scss
index 386ca4c..aad5d17 100644
--- a/_assets/css/main.scss
+++ b/_assets/css/main.scss
@@ -46,4 +46,8 @@ body.submenu {
 
 .post-title {
     font-weight: $font-weight-normal;
+}
+
+.card.sidebar {
+    width: 20rem;
 }
\ No newline at end of file
diff --git a/_includes/sidebar.html b/_includes/sidebar.html
index 7f0ec11..ec6bd5e 100644
--- a/_includes/sidebar.html
+++ b/_includes/sidebar.html
@@ -1,4 +1,4 @@
-<div class="card" style="width: 20rem;">
+<div class="card sidebar">
     <img class="card-img-top" src="{{ site.data.author.image }}" alt="Image of {{ site.data.author.name }}">
     <div class="card-body">
         <p class="card-text">