diff --git a/assets/themes/default/_article.scss b/assets/themes/default/_article.scss
index 5d1ee909..9bc887d5 100644
--- a/assets/themes/default/_article.scss
+++ b/assets/themes/default/_article.scss
@@ -98,7 +98,7 @@ main article {
   }
 
   blockquote {
-    border-left: 5px solid $gray;
+    border-inline-start: 5px solid $gray;
     margin: 1em auto;
     padding: 0em 2em;
   }