diff --git a/DomainClasses/packages.config b/DomainClasses/packages.config
index c2aab2e..14c95fb 100644
--- a/DomainClasses/packages.config
+++ b/DomainClasses/packages.config
@@ -5,7 +5,7 @@
   <package id="Microsoft.AspNet.SignalR.Core" version="2.2.1" targetFramework="net461" />
   <package id="Microsoft.AspNet.SignalR.JS" version="2.2.1" targetFramework="net461" />
   <package id="Microsoft.AspNet.SignalR.SystemWeb" version="2.2.1" targetFramework="net461" />
-  <package id="Microsoft.Owin" version="2.1.0" targetFramework="net461" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net461" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="2.1.0" targetFramework="net461" />
   <package id="Microsoft.Owin.Security" version="2.1.0" targetFramework="net461" />
   <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net461" />