diff --git a/WebchatBuilder/WebChatBuilderService/packages.config b/WebchatBuilder/WebChatBuilderService/packages.config
index 7c5fab6..2c7bfeb 100644
--- a/WebchatBuilder/WebChatBuilderService/packages.config
+++ b/WebchatBuilder/WebChatBuilderService/packages.config
@@ -9,7 +9,7 @@
   <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.OwinSelfHost" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.SelfHost" version="5.2.3" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.HttpListener" version="2.0.2" targetFramework="net45" />
   <package id="Microsoft.Owin.Hosting" version="2.0.2" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net45" />