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diff --git a/vendor/symfony/dom-crawler/Field/FileFormField.php b/vendor/symfony/dom-crawler/Field/FileFormField.php
index 0e0f94347..fc21239f0 100644
--- a/vendor/symfony/dom-crawler/Field/FileFormField.php
+++ b/vendor/symfony/dom-crawler/Field/FileFormField.php
@@ -59,7 +59,7 @@ class FileFormField extends FormField
             $name = $info['basename'];
 
             // copy to a tmp location
-            $tmp = sys_get_temp_dir().'/'.sha1(uniqid(mt_rand(), true));
+            $tmp = sys_get_temp_dir().'/'.strtr(substr(base64_encode(hash('sha256', uniqid(mt_rand(), true), true)), 0, 7), '/', '_');
             if (array_key_exists('extension', $info)) {
                 $tmp .= '.'.$info['extension'];
             }