diff --git a/src/lib/css/md.css b/src/lib/css/md.css
index adc009644..b6bde128c 100644
--- a/src/lib/css/md.css
+++ b/src/lib/css/md.css
@@ -22,3 +22,6 @@
 .markdown-body .hljs-left {
     text-align: left;
 }
+.markdown-body .hljs {
+    overflow: auto;
+}
\ No newline at end of file