diff --git a/source/NuGet.Lucene.Web.OwinHost.Sample/packages.config b/source/NuGet.Lucene.Web.OwinHost.Sample/packages.config
index 07edf22..13d26b4 100644
--- a/source/NuGet.Lucene.Web.OwinHost.Sample/packages.config
+++ b/source/NuGet.Lucene.Web.OwinHost.Sample/packages.config
@@ -7,7 +7,7 @@
   <package id="Autofac.WebApi2.Owin" version="3.3.0" targetFramework="net45" />
   <package id="Common.Logging" version="2.3.1" targetFramework="net45" />
   <package id="Common.Logging.Log4Net1211" version="2.3.1" targetFramework="net45" />
-  <package id="log4net" version="2.0.5" targetFramework="net45" />
+  <package id="log4net" version="2.0.10" targetFramework="net45" />
   <package id="Lucene.Net" version="3.0.3" targetFramework="net45" />
   <package id="Lucene.Net.Linq" version="3.6.0" targetFramework="net45" />
   <package id="Microsoft.AspNet.SignalR.Core" version="2.2.0" targetFramework="net45" />
@@ -18,7 +18,7 @@
   <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.OwinSelfHost" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.3" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Diagnostics" version="3.0.1" 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" />
@@ -29,5 +29,5 @@
   <package id="NuGet.Core" version="2.11.1" targetFramework="net45" />
   <package id="Owin" version="1.0" targetFramework="net45" />
   <package id="Remotion.Linq" version="1.15.9.0" targetFramework="net45" allowedVersions="[1.15.9]" />
-  <package id="SharpZipLib" version="0.86.0" targetFramework="net45" />
+  <package id="SharpZipLib" version="1.0.0" targetFramework="net45" />
 </packages>