diff --git a/TSOClient/FSO.Server.Api/packages.config b/TSOClient/FSO.Server.Api/packages.config
index 38975f8a5..6cefbd1bb 100644
--- a/TSOClient/FSO.Server.Api/packages.config
+++ b/TSOClient/FSO.Server.Api/packages.config
@@ -25,7 +25,7 @@
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.0" targetFramework="net45" />
   <package id="Microsoft.jQuery.Unobtrusive.Validation" version="3.2.3" targetFramework="net45" />
   <package id="Microsoft.Net.Compilers" version="1.0.0" targetFramework="net45" developmentDependency="true" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net45" />
   <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" />
   <package id="Modernizr" version="2.6.2" targetFramework="net45" />
   <package id="Newtonsoft.Json" version="12.0.2" targetFramework="net45" />