From 5f6de61391237b421fee3c5c74f8d06e0c7b7b53 Mon Sep 17 00:00:00 2001
From: Bjarke Berg <mail@bergmania.dk>
Date: Tue, 18 Aug 2020 11:36:45 +0200
Subject: [PATCH] Fix iss issue

---
 src/Umbraco.Web.UI.NetCore/Startup.cs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Umbraco.Web.UI.NetCore/Startup.cs b/src/Umbraco.Web.UI.NetCore/Startup.cs
index deba559ed1..21faae22f2 100644
--- a/src/Umbraco.Web.UI.NetCore/Startup.cs
+++ b/src/Umbraco.Web.UI.NetCore/Startup.cs
@@ -63,6 +63,10 @@ namespace Umbraco.Web.UI.NetCore
                 options.AllowSynchronousIO = true;
             });
 
+            services.Configure<IISServerOptions>(options =>
+            {
+                options.AllowSynchronousIO = true;
+            });
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.