diff --git a/src/Squidex/Startup.cs b/src/Squidex/Startup.cs
index cc96ea758..8a5d091c9 100644
--- a/src/Squidex/Startup.cs
+++ b/src/Squidex/Startup.cs
@@ -7,6 +7,7 @@
 // ==========================================================================
 
 using System;
+using System.IO;
 using Autofac;
 using Autofac.Extensions.DependencyInjection;
 using Microsoft.AspNetCore.Builder;