diff --git a/src/lib/components/Markdown.css b/src/lib/components/Markdown.css
index 5222bb5..1c8e936 100644
--- a/src/lib/components/Markdown.css
+++ b/src/lib/components/Markdown.css
@@ -39,7 +39,7 @@
         }
     }
 
-    & a[target="_blank"]:after {
+    & a[target="_blank"]::after {
         content: '';
         display: inline-block;
         width: .5em;