diff --git a/lib/keystore.js b/lib/keystore.js
index 4dd02db7..5e248b6b 100644
--- a/lib/keystore.js
+++ b/lib/keystore.js
@@ -339,7 +339,7 @@ KeyStore.deriveKeyFromPasswordAndSalt = function(password, salt, callback) {
   var logN = 14;
   var r = 8;
   var dkLen = 32;
-  var interruptStep = 200;
+  var interruptStep = 2000;
 
   var cb = function(derKey) {
     var err = null