diff --git a/Dataphoria/Dataphoria.Web.FHIR/packages.config b/Dataphoria/Dataphoria.Web.FHIR/packages.config
index 2f35a8e03..9a54d8429 100644
--- a/Dataphoria/Dataphoria.Web.FHIR/packages.config
+++ b/Dataphoria/Dataphoria.Web.FHIR/packages.config
@@ -20,7 +20,7 @@
   <package id="Microsoft.AspNet.WebPages" version="3.2.2" targetFramework="net452" />
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.0" targetFramework="net452" />
   <package id="Microsoft.Net.Compilers" version="1.0.0" targetFramework="net452" developmentDependency="true" />
-  <package id="Microsoft.Owin" version="3.0.0" targetFramework="net452" />
+  <package id="Microsoft.Owin" version="4.2.2" targetFramework="net452" />
   <package id="Microsoft.Owin.Security" version="3.0.0" targetFramework="net452" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Security.Google" version="3.0.0" targetFramework="net452" />