diff --git a/async-api/waas-async-api.yaml b/async-api/waas-async-api.yaml
index fb9a531..707fd29 100644
--- a/async-api/waas-async-api.yaml
+++ b/async-api/waas-async-api.yaml
@@ -1,7 +1,7 @@
 asyncapi: 2.3.0
 info:
   title: Profee WAAS Notificatioins API
-  version: 1.0
+  version: '1.0'
   description: The following notifications will be sent to partner system. Please provide us with URLs which will be responsible in every notification.
 channels:
   card/authorization: