1 files changed, 2 insertions, 1 deletions
diff --git a/packages/merchant-backoffice-ui/src/declaration.d.ts b/packages/merchant-backoffice-ui/src/declaration.d.ts
index 8afa2f781..db3122266 100644
--- a/packages/merchant-backoffice-ui/src/declaration.d.ts
+++ b/packages/merchant-backoffice-ui/src/declaration.d.ts
@@ -1331,12 +1331,13 @@ export namespace MerchantBackend {
   }
 
   namespace Webhooks {
+    type MerchantWebhookType = "pay" | "refund";
     interface WebhookAddDetails {
       // Webhook ID to use.
       webhook_id: string;
 
       // The event of the webhook: why the webhook is used.
-      event_type: string;
+      event_type: MerchantWebhookType;
 
       // URL of the webhook where the customer will be redirected.
       url: string;