diff --git a/lib/jwt.js b/lib/jwt.js
index 3d8e26e..89ebb55 100644
--- a/lib/jwt.js
+++ b/lib/jwt.js
@@ -19,7 +19,7 @@ module.exports = fp(async function (app, pluginOpts) {
       const userDataNoNamespace = {}
       for (const key of Object.keys(user)) {
         if (key.startsWith(namespace)) {
-          userDataNoNamespace[key.slice(namespace.length)] = user[key]
+          userDataNoNamespace[key.slice(namespace.length).replace(/^\//g, '')] = user[key]
         } else {
           userDataNoNamespace[key] = user[key]
         }