diff --git a/tools/doc/html.js b/tools/doc/html.js
index 34903e70040e3d..8a08004c11733e 100644
--- a/tools/doc/html.js
+++ b/tools/doc/html.js
@@ -189,7 +189,8 @@ function altDocs(filename) {
   }
 
   const versions = [
-    { num: '8.x' },
+    { num: '9.x' },
+    { num: '8.x', lts: true },
     { num: '7.x' },
     { num: '6.x', lts: true },
     { num: '5.x' },