diff --git a/Thumbnailer.php b/Thumbnailer.php
index fd94b33..9bf9ca5 100755
--- a/Thumbnailer.php
+++ b/Thumbnailer.php
@@ -248,7 +248,8 @@ protected function generateThumbnail(
         )
     {
         $filename = basename($url);
-        $thumbnailPath = Yii::getAlias("$this->thumbnailsPath/{$width}x{$height}/{$filename}");
+        $hash = hash('crc32', $url, FALSE);
+        $thumbnailPath = Yii::getAlias("$this->thumbnailsPath/{$width}x{$height}/{$hash}-{$filename}");
 
         try {
             if ($ignore_certificate){