diff --git a/src/Squidex/project.json b/src/Squidex/project.json
index d38ab314f..f1c166103 100644
--- a/src/Squidex/project.json
+++ b/src/Squidex/project.json
@@ -37,6 +37,7 @@
   },
 
   "tools": {
+    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.1.0-preview4-final"
   },
 
   "frameworks": {