diff --git a/src/GoogleCloudStorageServiceProvider.php b/src/GoogleCloudStorageServiceProvider.php
index c45aee0..520254a 100644
--- a/src/GoogleCloudStorageServiceProvider.php
+++ b/src/GoogleCloudStorageServiceProvider.php
@@ -85,6 +85,13 @@ public function boot()
     private function createClient($config)
     {
         $keyFile = Arr::get($config, 'key_file');
+        
+        if (is_null($keyFile)) {
+            return new StorageClient([
+                'projectId' => $config['project_id'],
+            ]);
+        }
+        
         if (is_string($keyFile)) {
             return new StorageClient([
                 'projectId' => $config['project_id'],