diff --git a/yycms.admin/packages.config b/yycms.admin/packages.config
index 8689e3c..eff8164 100644
--- a/yycms.admin/packages.config
+++ b/yycms.admin/packages.config
@@ -30,7 +30,7 @@
   <package id="Microsoft.AspNet.WebApi.WebHost.zh-Hans" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebPages.zh-Hans" version="3.2.3" targetFramework="net45" />
-  <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb.zh-Hans" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" />