diff --git a/docs/borg_theme/css/borg.css b/docs/borg_theme/css/borg.css
index 9b8074ee7..bb5a4d0d0 100644
--- a/docs/borg_theme/css/borg.css
+++ b/docs/borg_theme/css/borg.css
@@ -31,6 +31,7 @@
 
 #internals .toctree-wrapper > ul {
     column-count: 3;
+    -webkit-column-count: 3;
 }
 
 #internals .toctree-wrapper > ul > li {