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" />