diff --git a/app/views/promises/show.json.jbuilder b/app/views/promises/show.json.jbuilder
index c2cba17..2306d81 100644
--- a/app/views/promises/show.json.jbuilder
+++ b/app/views/promises/show.json.jbuilder
@@ -12,6 +12,8 @@ json.(@promise,
   :date_issued,
   :last_evidence_date
 )
+json.source_url @promise.source_document_url
+
 
 json.evidences do
   json.partial! "evidences/evidence", collection: @promise.evidences.impactful, as: :evidence