diff --git a/meta/io.murano/Classes/User.yaml b/meta/io.murano/Classes/User.yaml
index 34824f630..ea203adb9 100644
--- a/meta/io.murano/Classes/User.yaml
+++ b/meta/io.murano/Classes/User.yaml
@@ -11,4 +11,4 @@ Properties:
     Contract: $.string()
   extra:
     Contract:
-      $.string().notNull(): $.string()
+      $.string().notNull(): $