diff --git a/app/Models/User.php b/app/Models/User.php
index 07ebb5f..f059f1e 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -152,7 +152,10 @@ class User extends Authenticatable
     }
 
     /**
-     * Cek apakah token sesi aktif masih "hidup" (session file/DB masih ada).
+     * Cek apakah token sesi aktif masih "hidup".
+     * Sesi dianggap hidup hanya jika file/row masih ada DAN belum lewat masa
+     * hidup (session.lifetime). Sesi yang sudah kadaluarsa dianggap mati,
+     * sehingga user bebas login lagi di perangkat mana pun.
      * Driver array/lain → dianggap hidup (aman, tolak login ganda).
      */
     public function sessionTokenIsAlive(): bool
@@ -162,12 +165,31 @@ class User extends Authenticatable
             return false;
         }
 
+        $lifetimeSeconds = (int) config('session.lifetime') * 60;
+
         return match (config('session.driver')) {
-            'file' => file_exists(storage_path('framework/sessions/'.$token)),
+            'file' => $this->fileSessionIsAlive($token, $lifetimeSeconds),
             'database' => \Illuminate\Support\Facades\DB::table(config('session.table', 'sessions'))
                 ->where('id', $token)
+                ->where('last_activity', '>=', time() - $lifetimeSeconds)
                 ->exists(),
             default => true,
         };
     }
+
+    /**
+     * Cek sesi berbasis file: file ada DAN aktivitas terakhir (mtime) masih
+     * dalam masa hidup. Laravel menulis ulang file sesi di setiap request,
+     * jadi mtime = aktivitas terakhir user.
+     */
+    protected function fileSessionIsAlive(string $token, int $lifetimeSeconds): bool
+    {
+        $path = storage_path('framework/sessions/'.$token);
+
+        if (! is_file($path)) {
+            return false;
+        }
+
+        return (time() - (int) filemtime($path)) <= $lifetimeSeconds;
+    }
 }
diff --git a/tests/Feature/SingleSessionTest.php b/tests/Feature/SingleSessionTest.php
index aba83fe..1b24973 100644
--- a/tests/Feature/SingleSessionTest.php
+++ b/tests/Feature/SingleSessionTest.php
@@ -94,4 +94,48 @@ class SingleSessionTest extends TestCase
 
         $this->assertNull($user->refresh()->active_session_token);
     }
+
+    public function test_sesi_yang_sudah_kadaluarsa_dianggap_mati(): void
+    {
+        // Produksi pakai driver file — uji perilaku sesungguhnya
+        config()->set('session.driver', 'file');
+
+        $user = $this->makeUser();
+        $sessionId = str_repeat('a', 40); // id sesi valid (format 40 char)
+        $user->forceFill(['active_session_token' => $sessionId])->save();
+
+        // Simulasikan file sesi lama: sudah lewat masa hidup (10 menit lalu)
+        $file = storage_path('framework/sessions/'.$sessionId);
+        file_put_contents($file, 'expired');
+        touch($file, time() - 600);
+
+        $this->assertFalse($user->refresh()->sessionTokenIsAlive());
+
+        // Login kedua harusnya DITERIMA sekarang
+        $this->post('/login', [
+            'username' => 'bksession',
+            'password' => 'rahasia123',
+        ])->assertRedirect();
+
+        $this->assertAuthenticated();
+        @unlink($file);
+    }
+
+    public function test_sesi_yang_masih_hidup_dianggap_hidup(): void
+    {
+        // Produksi pakai driver file — uji perilaku sesungguhnya
+        config()->set('session.driver', 'file');
+
+        $user = $this->makeUser();
+        $sessionId = str_repeat('b', 40);
+        $user->forceFill(['active_session_token' => $sessionId])->save();
+
+        // File sesi baru (aktivitas sekarang)
+        $file = storage_path('framework/sessions/'.$sessionId);
+        file_put_contents($file, 'fresh');
+        touch($file);
+
+        $this->assertTrue($user->refresh()->sessionTokenIsAlive());
+        @unlink($file);
+    }
 }