diff --git a/client/less/challenge.less b/client/less/challenge.less
index ceaf40c2a82f76..bf8fb039134b2e 100644
--- a/client/less/challenge.less
+++ b/client/less/challenge.less
@@ -7,6 +7,17 @@
   margin-bottom: 10px;
 }
 
+.challenges-instructions-panel::-webkit-scrollbar {
+  -webkit-appearance: none;
+  width: 7px;
+}
+
+.challenges-instructions-panel::-webkit-scrollbar-thumb {
+  border-radius: 4px;
+  background-color: rgba(0,0,0,.5);
+  -webkit-box-shadow: 0 0 1px rgba(255,255,255,.5);
+}
+
 .challenge-step-description {
   font-size: 1.5em;
 }
@@ -217,4 +228,4 @@ iframe.iphone {
   @media (min-width: 1200px) and (max-width: 1250px){
     right: -207px;
   }
-}
\ No newline at end of file
+}