diff --git a/app/Http/Requests/Chart/ShowChartRequest.php b/app/Http/Requests/Chart/ShowChartRequest.php
index 83754f2a86e0..0293513d2555 100644
--- a/app/Http/Requests/Chart/ShowChartRequest.php
+++ b/app/Http/Requests/Chart/ShowChartRequest.php
@@ -28,8 +28,9 @@ class ShowChartRequest extends Request
     public function rules()
     {
         return [
-            'start_date' => 'date',
-            'end_date' => 'date',
+            'date_range' => 'bail|sometimes|string|in:last7_days,last30_days,last365_days,this_month,last_month,this_quarter,last_quarter,this_year,last_year,all_time,custom',
+            'start_date' => 'bail|sometimes|date',
+            'end_date' => 'bail|sometimes|date',
         ];
     }