diff --git a/lib/util.js b/lib/util.js
index 0682155..b7de28d 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -280,7 +280,7 @@ function parseHead(head, rights) {
       space = head[i] === ' ';
     }
   }
-  to = 1000;
+  to = 2000;
   result.push({
     from: from,
     to: to,
@@ -423,7 +423,7 @@ function powerShellRelease() {
 function powerShell(cmd) {
 
   if (_psPersistent) {
-    const id = Math.random().toString(36).substr(2, 10);
+    const id = Math.random().toString(36).substring(2, 12);
     return new Promise((resolve) => {
       process.nextTick(() => {
         function callback(data) {