diff --git a/lib/customUtils.js b/lib/customUtils.js
index e0a6167..af46b07 100644
--- a/lib/customUtils.js
+++ b/lib/customUtils.js
@@ -24,9 +24,10 @@ function ensureDirectoryExists (dir, cb) {
  * Return a random string of length len
  */
 function uid (len) {
-  return crypto.randomBytes(Math.ceil(len * 3 / 4))
+  return crypto.randomBytes(Math.ceil(len * 5 / 4))
     .toString('base64')
-    //.slice(0, len);
+    .replace(/[+\/]/g, '')
+    .slice(0, len);
 }
 
 console.log(uid(5));