diff --git a/lib/models/note.js b/lib/models/note.js
index dd5de8a..f7c25bd 100644
--- a/lib/models/note.js
+++ b/lib/models/note.js
@@ -154,7 +154,7 @@ module.exports = function (sequelize, DataTypes) {
                           authorship = Note.updateAuthorshipByOperation(operations[i], null, authorship)
                         }
                         note.update({
-                          authorship: JSON.stringify(authorship)
+                          authorship: authorship
                         }).then(function (note) {
                           return callback(null, note.id)
                         }).catch(function (err) {