diff --git a/scripts/mongodb/stored/updatePrepaid.js b/scripts/mongodb/stored/updatePrepaid.js
new file mode 100644
index 000000000..cc0c53615
--- /dev/null
+++ b/scripts/mongodb/stored/updatePrepaid.js
@@ -0,0 +1,73 @@
+
+// Update a prepaid document, and the denormalized data on user documents
+// Limits the properties allowed to be set, but does not perform validation on them. Use carefully!
+
+// Usage
+// ---------------
+// In mongo shell
+//
+// > db.loadServerScripts();
+// > updatePrepaid('<prepaid id string>', { endDate: "2017-07-01T00:00:00.000Z", maxRedeemers: 10 });
+
+var updatePrepaid = function updatePrepaid(stringID, originalUpdate) {
+  try {
+    load('./bower_components/lodash/dist/lodash.js')
+  }
+  catch (e) {
+    print('Lodash could not be loaded, ensure you are in codecombat project directory.')
+    return;
+  }
+  
+  try {
+    var id = ObjectId(stringID);
+  }
+  catch (e) {
+    print('Invalid ObjectId given:', stringID);
+    return;
+  }
+
+  var prepaid = db.prepaids.findOne({_id: id});
+  if (!prepaid) {
+    print('Prepaid not found');
+    return;
+  }
+
+  print('Found prepaid', _.omit(prepaid, 'redeemers'));
+  print('Has', prepaid.redeemers.length, 'redeemers.');
+
+  var prepaidUpdate = _.pick(originalUpdate, 'maxRedeemers', 'startDate', 'endDate' );
+  if (_.isEmpty(prepaidUpdate)) {
+    print('Skipping prepaid update, nothing to update.')
+  }
+  else {
+    print('Update prepaid',
+      JSON.stringify(prepaidUpdate, null, '  '),
+      db.prepaids.update(
+        {_id: id},
+        { $set: prepaidUpdate }
+      )
+    )
+  }
+  
+  var userUpdate = _.pick(originalUpdate, 'startDate', 'endDate' );
+  if (_.isEmpty(userUpdate)) {
+    print('Skipping user update, nothing to update.')
+  }
+  else {
+    print('Update users', 
+      JSON.stringify(userUpdate, null, '  '), 
+      db.users.update(
+        {'coursePrepaid._id': id},
+        {$set: userUpdate}, 
+        {multi: true}
+      )
+    );
+  }
+};
+
+db.system.js.save(
+  {
+    _id: 'updatePrepaid',
+    value: updatePrepaid
+  }
+);