diff --git a/src/CoordinateSystems/S2Geometry/packages.config b/src/CoordinateSystems/S2Geometry/packages.config
index 1246482b..c02d7818 100644
--- a/src/CoordinateSystems/S2Geometry/packages.config
+++ b/src/CoordinateSystems/S2Geometry/packages.config
@@ -20,7 +20,7 @@
   <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net45" />
   <package id="Microsoft.IO.RecyclableMemoryStream" version="1.2.1" targetFramework="net45" />
   <package id="Microsoft.NETCore.Platforms" version="1.0.1" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.2.2" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.0.1" targetFramework="net45" />