diff --git a/packages/language-server/tsconfig.json b/packages/language-server/tsconfig.json
index 7d85e79841..360c8f76de 100644
--- a/packages/language-server/tsconfig.json
+++ b/packages/language-server/tsconfig.json
@@ -1,7 +1,8 @@
 {
   "extends": "../../tsconfig.json",
   "compilerOptions": {
-    "module": "commonjs",
+    "module": "Node16",
+    "moduleResolution": "Node16",
     "target": "es6",
     "outDir": "dist",
     "noUnusedLocals": false,
diff --git a/packages/language-server/vitest.config.ts b/packages/language-server/vitest.config.mts
similarity index 100%
rename from packages/language-server/vitest.config.ts
rename to packages/language-server/vitest.config.mts