diff --git a/aaLogWebAPI/packages.config b/aaLogWebAPI/packages.config
index 3bc7a0d..7bfc972 100644
--- a/aaLogWebAPI/packages.config
+++ b/aaLogWebAPI/packages.config
@@ -7,7 +7,7 @@
   <package id="Microsoft.AspNet.WebApi.OwinSelfHost" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.OData.Core" version="6.13.0" targetFramework="net45" />
   <package id="Microsoft.OData.Edm" version="6.13.0" 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="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Hosting" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Spatial" version="6.13.0" targetFramework="net45" />