diff --git a/back/methods/mrw-config/getLabel.js b/back/methods/mrw-config/getLabel.js
index ae6bc8f21..aa9b87af1 100644
--- a/back/methods/mrw-config/getLabel.js
+++ b/back/methods/mrw-config/getLabel.js
@@ -4,7 +4,7 @@ module.exports = Self => {
         accessType: 'READ',
         accepts: [{
             arg: 'shipmentId',
-            type: 'number',
+            type: 'string',
             required: true
         }],
         returns: {