diff --git a/src/t3ran13/ByteBuffer/ByteBuffer.php b/src/t3ran13/ByteBuffer/ByteBuffer.php
index 7ff9b12..f87f14c 100644
--- a/src/t3ran13/ByteBuffer/ByteBuffer.php
+++ b/src/t3ran13/ByteBuffer/ByteBuffer.php
@@ -131,7 +131,7 @@ public function writeVStringLE($value, $offset = null) {
         if ($offset === null) {
             $offset = $this->currentOffset;
         }
-        $bytes = unpack('c*', $value); //string to bytes in int
+        $bytes = unpack('C*', $value); //string to bytes in int
         $total = count($bytes);
         for ($i = 0; $i < $total; $i++) {
             $this->buffer[$offset++] = pack('H*', base_convert($bytes[$i+1], 10, 16));
@@ -156,7 +156,7 @@ public function writeVStringBE($value, $offset = null) {
         if ($offset === null) {
             $offset = $this->currentOffset;
         }
-        $bytes = unpack('c*', $value); //string to bytes in int
+        $bytes = unpack('C*', $value); //string to bytes in int
         $total = count($bytes);
         for ($i = 0; $i < $total; $i++) {
             $this->buffer[$offset++] = pack('h*', base_convert($bytes[$i+1], 10, 16));