diff --git a/app/Http/Middleware/PreventBackHistory.php b/app/Http/Middleware/PreventBackHistory.php
index ccba254149..8533965b4f 100644
--- a/app/Http/Middleware/PreventBackHistory.php
+++ b/app/Http/Middleware/PreventBackHistory.php
@@ -16,9 +16,9 @@ class PreventBackHistory
     public function handle($request, Closure $next)
     {
         $headers = [
-            'Cache-Control'      => 'nocache, no-store, max-age=0, must-revalidate',
-            'Pragma'     => 'no-cache',
-            'Expires' => 'Sun, 02 Jan 1990 00:00:00 GMT'
+            'Cache-Control' => 'no-cache, no-store, max-age=0, must-revalidate',
+            'Pragma'        => 'no-cache',
+            'Expires'       => 'Sun, 02 Jan 1990 00:00:00 GMT'
         ];
         $response = $next($request);
         foreach($headers as $key => $value) {