diff --git a/tsconfig.extensions.json b/tsconfig.extensions.json
index 2d763e2f27..fe974b272d 100644
--- a/tsconfig.extensions.json
+++ b/tsconfig.extensions.json
@@ -4,6 +4,7 @@
     "src/extensions/extension-api.ts",
   ],
   "compilerOptions": {
+    "module": "CommonJS",
     "sourceMap": false,
     "declaration": true
   },