diff --git a/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj b/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj
index cbd1d2ce..53e8c000 100644
--- a/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj
+++ b/Agiil.Auth.Impl/Agiil.Auth.Impl.csproj
@@ -21,7 +21,7 @@
     <PackageReference Include="Iesi.Collections" Version="4.0.0.4000" />
     <PackageReference Include="Microsoft.AspNet.Identity.Core" Version="2.2.1" />
     <PackageReference Include="Microsoft.AspNet.Identity.Owin" Version="2.2.1" />
-    <PackageReference Include="Microsoft.Owin" Version="3.0.1" />
+    <PackageReference Include="Microsoft.Owin" Version="4.0.0" />
     <PackageReference Include="Microsoft.Owin.Security" Version="3.0.1" />
     <PackageReference Include="Microsoft.Owin.Security.Cookies" Version="3.0.1" />
     <PackageReference Include="Microsoft.Owin.Security.OAuth" Version="3.0.1" />
diff --git a/Agiil.Bootstrap/Agiil.Bootstrap.csproj b/Agiil.Bootstrap/Agiil.Bootstrap.csproj
index d580fb8f..87341c84 100644
--- a/Agiil.Bootstrap/Agiil.Bootstrap.csproj
+++ b/Agiil.Bootstrap/Agiil.Bootstrap.csproj
@@ -16,7 +16,7 @@
     <PackageReference Include="NHibernate" Version="4.0.0.4000" />
     <PackageReference Include="Autofac" Version="4.9.4" />
     <PackageReference Include="Owin" Version="1.0" />
-    <PackageReference Include="Microsoft.Owin" Version="3.0.1" />
+    <PackageReference Include="Microsoft.Owin" Version="4.0.0" />
     <PackageReference Include="Microsoft.Owin.Security" Version="3.0.1" />
     <PackageReference Include="Microsoft.Owin.Security.Cookies" Version="3.0.1" />
     <PackageReference Include="Microsoft.Owin.Host.SystemWeb" Version="3.0.1" />
diff --git a/Agiil.Web.OAuth/Agiil.Web.OAuth.csproj b/Agiil.Web.OAuth/Agiil.Web.OAuth.csproj
index b955bc30..5d0c2a5a 100644
--- a/Agiil.Web.OAuth/Agiil.Web.OAuth.csproj
+++ b/Agiil.Web.OAuth/Agiil.Web.OAuth.csproj
@@ -15,7 +15,7 @@
     <PackageReference Include="CSF.Configuration" Version="1.1.2" />
     <PackageReference Include="CSF.Security" Version="2.0.2" />
     <PackageReference Include="Owin" Version="1.0" />
-    <PackageReference Include="Microsoft.Owin" Version="3.0.1" />
+    <PackageReference Include="Microsoft.Owin" Version="4.0.0" />
     <PackageReference Include="Microsoft.Owin.Security" Version="3.0.1" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="4.0.0" />
     <PackageReference Include="Microsoft.Owin.Security.OAuth" Version="3.0.1" />
diff --git a/Agiil.Web/packages.config b/Agiil.Web/packages.config
index cdbc10a8..82b1f471 100644
--- a/Agiil.Web/packages.config
+++ b/Agiil.Web/packages.config
@@ -42,7 +42,7 @@
   <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.3" targetFramework="net45" />
   <package id="Microsoft.AspNet.WebPages" 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.Cors" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Diagnostics" version="3.0.1" targetFramework="net45" />
   <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net45" />