diff --git a/app/views/attachments/_attachment.json.jbuilder b/app/views/attachments/_attachment.json.jbuilder
index a21bf31c4..91d89a87e 100644
--- a/app/views/attachments/_attachment.json.jbuilder
+++ b/app/views/attachments/_attachment.json.jbuilder
@@ -12,5 +12,6 @@ json.filesize number_to_human_size(attachment.filesize)
 json.description attachment.description
 json.downloads_count attachment.downloads_count
 json.created_on attachment.created_on
+json.content_type attachment.content_type
 json.is_pdf attachment.is_pdf?
 json.url attachment.is_pdf? ? download_url(attachment,disposition:"inline") : download_url(attachment)