diff --git a/admin/upload.php b/admin/upload.php
index e1440a2..68eb697 100644
--- a/admin/upload.php
+++ b/admin/upload.php
@@ -1,7 +1,7 @@
 <?php
 
 function hashedName($fileName) {
-  return mhash(MHASH_ADLER32, $fileName);
+  return bin2hex(mhash(MHASH_ADLER32, $fileName));
 }
 
 $target_dir = __DIR__ . "/../slike/";