diff --git a/docs/docs/extra.css b/docs/docs/extra.css
index 2281f083dd0338b8b89c3bddeb9adcf4a8d46b92..2d5018975adace35e3a47009bbf2a9ef09de166c 100644
--- a/docs/docs/extra.css
+++ b/docs/docs/extra.css
@@ -1 +1,4 @@
-.codehilite {width: 590px;}
+.codehilite {
+  width: 590px;
+  overflow: auto;
+}