ttl: add missing required feature ui:parent.

2 files changed, 2 insertions, 2 deletions

diff --git a/VERSION b/VERSION
index c317a91..288adf5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.13.1
+0.13.3
diff --git a/vm_ui.ttl b/vm_ui.ttl
index 975cf13..c5a4c78 100644
--- a/vm_ui.ttl
+++ b/vm_ui.ttl
@@ -45,7 +45,7 @@ vm:vm_ui
 		lv2:symbol "notify" ;
 		ui:protocol atom:eventTransfer
 	] ;
-	lv2:requiredFeature ui:idleInterface, urid:map, urid:unmap, opts:options ;
+	lv2:requiredFeature ui:idleInterface, urid:map, urid:unmap, opts:options, ui:parent ;
 	lv2:optionalFeature log:log, ui:resize, opts:options ;
 	opts:supportedOption ui:scaleFactor ;
   lv2:extensionData ui:idleInterface, ui:resize ;