diff --git a/frontend/components/Domain/Group/GroupWebhookEditor.vue b/frontend/components/Domain/Group/GroupWebhookEditor.vue
index 26e507a0c..e3cbda236 100644
--- a/frontend/components/Domain/Group/GroupWebhookEditor.vue
+++ b/frontend/components/Domain/Group/GroupWebhookEditor.vue
@@ -54,7 +54,7 @@ export default defineComponent({
       get() {
         return itemLocal.value;
       },
-      set(v) {
+      set(v: string) {
         itemUTC.value = timeLocalToUTC(v);
         itemLocal.value = v;
       },