diff --git a/arduino-ide-extension/scripts/download-ls.js b/arduino-ide-extension/scripts/download-ls.js
index 930841f4..6bcd63c8 100755
--- a/arduino-ide-extension/scripts/download-ls.js
+++ b/arduino-ide-extension/scripts/download-ls.js
@@ -6,7 +6,7 @@
 (() => {
 
     const DEFAULT_ALS_VERSION = 'nightly';
-    const DEFAULT_CLANGD_VERSION = '8.0.1';
+    const DEFAULT_CLANGD_VERSION = '9.0.0';
 
     const os = require('os');
     const path = require('path');
@@ -23,7 +23,7 @@
         .option('clangd-version', {
             alias: 'cv',
             default: DEFAULT_CLANGD_VERSION,
-            choices: ['8.0.1'],
+            choices: ['8.0.1', '9.0.0'],
             describe: `The version of 'clangd' to download. Defaults to ${DEFAULT_CLANGD_VERSION}.`
         })
         .option('force-download', {
@@ -69,4 +69,4 @@
         downloader.download(clangdUrl, clangd, 'clangd', force);
     }
 
-})();
\ No newline at end of file
+})();