diff --git a/Tests/LiquidProjections.Specs/packages.config b/Tests/LiquidProjections.Specs/packages.config
index cba900b..4ed6644 100644
--- a/Tests/LiquidProjections.Specs/packages.config
+++ b/Tests/LiquidProjections.Specs/packages.config
@@ -4,7 +4,7 @@
   <package id="FluentAssertions" version="5.0.0" targetFramework="net452" />
   <package id="FluentAssertions.Json" version="5.0.0" targetFramework="net452" />
   <package id="LiquidProjections.Abstractions" version="3.0.0" targetFramework="net452" />
-  <package id="Microsoft.Owin" version="3.1.0" targetFramework="net452" />
+  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net452" />
   <package id="Newtonsoft.Json" version="10.0.3" targetFramework="net452" />
   <package id="Owin" version="1.0" targetFramework="net452" />
   <package id="OwinHttpMessageHandler" version="1.3.8" targetFramework="net452" />