diff --git a/manifest.yaml b/manifest.yaml
index cbcd7fc3a..ee0b11417 100644
--- a/manifest.yaml
+++ b/manifest.yaml
@@ -96,7 +96,7 @@ dublin_core:
         - 
             identifier: tn
             language: id
-            version: ?
+            version: '?'
     subject: Translation Notes
     title: Translation Notes
     type: help