diff --git a/src/class.NumberBaseCryptCollection.php b/src/class.NumberBaseCryptCollection.php
index 85893f2..b1c7d96 100644
--- a/src/class.NumberBaseCryptCollection.php
+++ b/src/class.NumberBaseCryptCollection.php
@@ -55,7 +55,7 @@ class NumberBaseCryptCollection extends NumberBaseCrypt {
      */
     public function render() : string {
         $cd = [];
-        for($i=0;$i<$this->dataList;$i++) {
+        for($i=0;$i<count($this->dataList);$i++) {
             $cd[] = $this->addLength($this->base10ToBase($this->dataList[$i]));
         }
         return implode('', $cd);
@@ -67,7 +67,7 @@ class NumberBaseCryptCollection extends NumberBaseCrypt {
      */
     public function renderComplex() : string {
         $cd = [];
-        for($i=0;$i<$this->dataList;$i++) {
+        for($i=0;$i<count($this->dataList);$i++) {
             $this->setDigits($this->digitList[$i]);
             $cd[] = $this->addLength($this->base10ToBase($this->dataList[$i]));
         }