diff --git a/src/class.NumberBaseCryptCollection.php b/src/class.NumberBaseCryptCollection.php
index b1c7d96..b332a67 100644
--- a/src/class.NumberBaseCryptCollection.php
+++ b/src/class.NumberBaseCryptCollection.php
@@ -107,7 +107,7 @@ class NumberBaseCryptCollection extends NumberBaseCrypt {
      */
     public function decryptComplex(string $data, array $digitList) : array {
         $cd = [];
-        for($i=0;$i<$digitList;$i++) {
+        for($i=0;$i<count($digitList);$i++) {
             $numberBaseCrypt = new NumberBaseCrypt($digitList[$i]);
 
             $len = substr($data, 0, 1);