diff --git a/src/additionalExtensions.ts b/src/additionalExtensions.ts
index b5cd527..990ab8c 100644
--- a/src/additionalExtensions.ts
+++ b/src/additionalExtensions.ts
@@ -1 +1,8 @@
-export { whenReady } from '../extensions/*.vsix'
+import { whenReady as whenReadyCustomExtension } from './customExtensions'
+import { whenReady as whenReadyExtension } from '../extensions/*.vsix'
+
+const whenReady = async () => {
+  await Promise.all([whenReadyCustomExtension(), whenReadyExtension()])
+}
+
+export { whenReady }
diff --git a/src/customExtensions/cobol.ts b/src/customExtensions/cobol.ts
index 957ca0b..62a61c4 100644
--- a/src/customExtensions/cobol.ts
+++ b/src/customExtensions/cobol.ts
@@ -1,6 +1,6 @@
 import { ExtensionHostKind, registerExtension } from '@codingame/monaco-vscode-api/extensions'
 
-const { registerFileUrl } = registerExtension(
+const { registerFileUrl, whenReady } = registerExtension(
   {
     name: 'cobol-indent',
     publisher: 'codingame',
@@ -41,3 +41,5 @@ const { registerFileUrl } = registerExtension(
 )
 
 registerFileUrl('./extension.js', new URL('./cobol-extension.js', import.meta.url).href)
+
+export { whenReady }
diff --git a/src/customExtensions/index.ts b/src/customExtensions/index.ts
index 99281a2..2caadbc 100644
--- a/src/customExtensions/index.ts
+++ b/src/customExtensions/index.ts
@@ -1 +1 @@
-import './cobol'
+export { whenReady } from './cobol'
diff --git a/src/services.ts b/src/services.ts
index 7624f96..effe31f 100644
--- a/src/services.ts
+++ b/src/services.ts
@@ -33,7 +33,6 @@ import { IWorkbenchConstructionOptions, IWorkspaceProvider } from '@codingame/mo
 import EditorOpenHandlerRegistry from './tools/EditorOpenHandlerRegistry'
 import { whenReady as whenExtensionsReady } from './extensions'
 import 'vscode/localExtensionHost'
-import './customExtensions'
 import './languages'
 import './worker'