diff --git a/swh/web/assets/src/utils/highlightjs.css b/swh/web/assets/src/utils/highlightjs.css
index c669d918..478f6b99 100644
--- a/swh/web/assets/src/utils/highlightjs.css
+++ b/swh/web/assets/src/utils/highlightjs.css
@@ -1,33 +1,34 @@
 /**
  * Copyright (C) 2018  The Software Heritage developers
  * See the AUTHORS file at the top-level directory of this distribution
  * License: GNU Affero General Public License version 3, or any later version
  * See top-level LICENSE file for more information
  */
 
 .highlightjs pre {
     background-color: transparent;
     border-radius: 0;
     border-color: transparent;
 }
 
 .hljs {
     background-color: transparent;
     white-space: pre;
 }
 
 /* for block of numbers */
 .hljs-ln-numbers {
+    cursor: pointer;
     user-select: none;
     text-align: center;
     color: #aaa;
     border-right: 1px solid #ccc;
     vertical-align: top;
     padding-right: 5px !important;
 }
 
 /* for block of code */
 .hljs-ln-code {
     padding-left: 10px !important;
     width: 100%;
 }