diff --git a/backend/app/Http/Controllers/Api/AuthenticationTrait.php b/backend/app/Http/Controllers/Api/AuthenticationTrait.php
index bf3588dc..76ef7242 100644
--- a/backend/app/Http/Controllers/Api/AuthenticationTrait.php
+++ b/backend/app/Http/Controllers/Api/AuthenticationTrait.php
@@ -127,7 +127,7 @@ trait AuthenticationTrait {
         // セッションを想像する
         $login_user_datum = $this->makeSession($this->getGuard(), $get->toArray());
 
-        return ['status_code' => 200, 'params' => ['id' => $login_user_datum['id']]];
+        return ['status_code' => 200, 'params' => ['id' => $login_user_datum['id'], 'expire' => env('SESSION_LIFETIME')]];
     }
 
     public function logout () {