diff --git a/schema/paths/forms/specifyForm/index.yml b/schema/paths/forms/specifyForm/index.yml
index b16a5a1..f0cf1c4 100644
--- a/schema/paths/forms/specifyForm/index.yml
+++ b/schema/paths/forms/specifyForm/index.yml
@@ -49,6 +49,7 @@ patch:
     - $ref: '../../../types/forms/parameters.yml#/parameters/form_description'
     - $ref: '../../../types/forms/parameters.yml#/parameters/start_at'
     - $ref: '../../../types/forms/parameters.yml#/parameters/end_at'
+    - $ref: '../../../types/forms/parameters.yml#/parameters/webhook_url'
   responses:
     '200':
       description: 指定されたFormの更新に成功
diff --git a/schema/types/forms/parameters.yml b/schema/types/forms/parameters.yml
index a4deb28..8d7a625 100644
--- a/schema/types/forms/parameters.yml
+++ b/schema/types/forms/parameters.yml
@@ -42,6 +42,13 @@ parameters:
     required: false
     schema: 
       $ref: './components.yml#/components/schemas/end_at'
+  webhook_url:
+    name: webhookUrl
+    in: query
+    description: フォームの変更などを通知するリンク
+    required: false
+    schema:
+      $ref: './components.yml#/components/schemas/webhook_url'
   form_label_target:
     name: target
     in: query