diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 0cfee19..2b44cb2 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -34,7 +34,7 @@ const Native: Spec = Module
 export async function initializeKakaoSDK(
   appKey: string,
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
-  options: { web?: { javascriptKey: string; restApiKey: string } },
+  options?: { web?: { javascriptKey: string; restApiKey: string } },
 ): Promise<void> {
   Native.initializeKakaoSDK(appKey);
 }