diff --git a/Moriyama.AzureSearch.Umbraco.Application/packages.config b/Moriyama.AzureSearch.Umbraco.Application/packages.config
index c4daeb0..3017a69 100644
--- a/Moriyama.AzureSearch.Umbraco.Application/packages.config
+++ b/Moriyama.AzureSearch.Umbraco.Application/packages.config
@@ -23,7 +23,7 @@
   <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net452" />
   <package id="Microsoft.Azure.Search" version="3.0.4" targetFramework="net452" />
   <package id="Microsoft.IO.RecyclableMemoryStream" version="1.2.2" targetFramework="net452" />
-  <package id="Microsoft.Owin" version="3.1.0" targetFramework="net452" />
+  <package id="Microsoft.Owin" version="4.1.1" targetFramework="net452" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.1.0" targetFramework="net452" />
   <package id="Microsoft.Owin.Security" version="3.1.0" targetFramework="net452" />
   <package id="Microsoft.Owin.Security.Cookies" version="3.1.0" targetFramework="net452" />