diff --git a/src/Jobs/SamlSso.php b/src/Jobs/SamlSso.php
index b6ea104..3e8715f 100644
--- a/src/Jobs/SamlSso.php
+++ b/src/Jobs/SamlSso.php
@@ -178,7 +178,7 @@ private function setDestination()
         }
 
         $queryParams = $this->getQueryParams();
-        if (!empty($queryParams)) {
+        if (is_array($queryParams) && !empty($queryParams)) {
             if (!parse_url($destination, PHP_URL_QUERY)) {
                 $destination = Str::finish(url($destination), '?') . Arr::query($queryParams);
             } else {