diff --git a/src/core-worker.ts b/src/core-worker.ts
index ac1df477..19fba4b5 100644
--- a/src/core-worker.ts
+++ b/src/core-worker.ts
@@ -62,5 +62,4 @@ export class SerializableCore {
     return this.core.makeFixableAndFix(results, ruleIds, fixableMaker);
   }
 }
-
-expose(SerializableCore, nodeEndpoint(parentPort));
+expose(SerializableCore, nodeEndpoint.default(parentPort));
diff --git a/src/index.ts b/src/index.ts
index d2fb732a..d00dca4f 100755
--- a/src/index.ts
+++ b/src/index.ts
@@ -34,7 +34,7 @@ export async function run(options: Options) {
   // Directly executing the Core API will hog the main thread and halt the spinner.
   // So we wrap it with comlink and run it on the Worker.
   const worker = new Worker(join(__dirname, 'core-worker.js'));
-  const ProxiedCore = wrap<typeof SerializableCore>(nodeEndpoint(worker));
+  const ProxiedCore = wrap<typeof SerializableCore>(nodeEndpoint.default(worker));
   const core = await new ProxiedCore(config);
 
   let nextScene: NextScene = { name: 'lint' };
diff --git a/tsconfig.base.json b/tsconfig.base.json
index 1e2fbe0c..7c141e03 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -15,7 +15,7 @@
     /* Module Options */
     "module": "node12",
     "moduleResolution": "node12",
-    "esModuleInterop": true, // CommonJS モジュールを `import _ from 'commonjs'` で import できるように
+    "esModuleInterop": false, // `"module": "node12"` との相性が悪いので off にする
     "resolveJsonModule": true, // import した json の型を推論するように
     "forceConsistentCasingInFileNames": true, // 大文字小文字を区別しない環境 (win) でも unix と同じように区別する