Set Mime type of imported JSON file

app/Http/Requests/Import/ImportJsonRequest.php

@@ -28,12 +28,7 @@ class ImportJsonRequest extends Request
     public function rules()
     {
         return [
-			// 'import_type' => 'required',
-   //          'files' => 'required_without:hash|array|min:1|max:6',
-   //          'hash' => 'nullable|string',
-   //          'column_map' => 'required_with:hash|array',
-   //          'skip_header' => 'required_with:hash|boolean',
-			// 'files.*' => 'file|mimes:csv,txt',
+            'files' => 'file|mimes:zip',
         ];
     }
 }