diff --git a/src/node/utils/randomstring.js b/src/node/utils/randomstring.js
index 622b0082d..4ffd3e8ae 100644
--- a/src/node/utils/randomstring.js
+++ b/src/node/utils/randomstring.js
@@ -1,10 +1,10 @@
+'use strict';
 /**
- * Generates a random String with the given length. Is needed to generate the Author, Group, readonly, session Ids
+ * Generates a random String with the given length. Is needed to generate the
+ * Author, Group, readonly, session Ids
  */
 const crypto = require('crypto');
 
-const randomString = function (len) {
-  return crypto.randomBytes(len).toString('hex');
-};
+const randomString = (len) => crypto.randomBytes(len).toString('hex');
 
 module.exports = randomString;