diff --git a/system/helpers/captcha_helper.php b/system/helpers/captcha_helper.php
index a4383c9..57ef9e2 100644
--- a/system/helpers/captcha_helper.php
+++ b/system/helpers/captcha_helper.php
@@ -80,8 +80,7 @@
 		$current_dir = @opendir($img_path);
 		while ($filename = @readdir($current_dir))
 		{
-			if ($filename !== '.' && $filename !== '..' && $filename !== 'index.html'
-				&& (str_replace('.jpg', '', $filename) + $expiration) < $now)
+			if (strpos($filename, ".jpg") !== FALSE && (str_replace('.jpg', '', $filename) + $expiration) < $now)
 			{
 				@unlink($img_path.$filename);
 			}