diff --git a/doc/api_assets/style.css b/doc/api_assets/style.css
index bb2e0290aa8fbd..8030c5ab3272fb 100644
--- a/doc/api_assets/style.css
+++ b/doc/api_assets/style.css
@@ -129,6 +129,7 @@ ol.version-picker {
   display: block;
   border-right: 0;
   margin-right: 0;
+  width: 100%;
 }
 
 ol.version-picker li a {