diff --git a/lib/webhook/model/source.ts b/lib/webhook/model/source.ts
index bb58dda1a..d2308750f 100644
--- a/lib/webhook/model/source.ts
+++ b/lib/webhook/model/source.ts
@@ -28,5 +28,5 @@ export type SourceBase = {
    *
    * @see <a href="https://developers.line.biz/en/reference/messaging-api/#source-user">type Documentation</a>
    */
-  type?: string /**/;
+  type: string /**/;
 };
diff --git a/line-openapi b/line-openapi
index 31fa3c734..2f3805813 160000
--- a/line-openapi
+++ b/line-openapi
@@ -1 +1 @@
-Subproject commit 31fa3c7340c17a495906c96cca14ed38a93caafa
+Subproject commit 2f38058136b8f9237feafe34ea86a4be98455fb3