diff --git a/packages/ui-default/components/monaco/loader.ts b/packages/ui-default/components/monaco/loader.ts
index 242ff1d58..1cc7a0b5e 100644
--- a/packages/ui-default/components/monaco/loader.ts
+++ b/packages/ui-default/components/monaco/loader.ts
@@ -28,8 +28,13 @@ const loaders = {
   },
 };
 
+let loadPromise = Promise.resolve();
+
 export async function load(features = ['markdown']) {
   let s = Date.now();
+  await loadPromise;
+  let resolve;
+  loadPromise = new Promise((r) => { resolve = r; });
   if (!loaded) {
     await loaders.i18n();
     console.log('Loading monaco editor');
@@ -60,6 +65,7 @@ export async function load(features = ['markdown']) {
     }
   }
   await res.loadThemePromise;
+  resolve();
   return { monaco: res.default, registerAction: res.registerAction };
 }
 
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index c88262614..8a67d88cc 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.40.8",
+  "version": "4.40.9",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",