diff --git a/pkg/schema/schema.go b/pkg/schema/schema.go
index 4dcd538..52445e5 100644
--- a/pkg/schema/schema.go
+++ b/pkg/schema/schema.go
@@ -179,7 +179,9 @@ type Schema struct {
 func (s *Schema) UnmarshalYAML(node *yaml.Node) error {
 	// Create an alias type to avoid recursion
 	type schemaAlias Schema
-	alias := &schemaAlias{}
+	alias := new(schemaAlias)
+	// copy all existing fields
+	*alias = schemaAlias(*s)
 
 	// Unmarshal known fields into alias
 	if err := node.Decode(alias); err != nil {