diff --git a/Samples/Stylet.Samples.ModelValidation/packages.config b/Samples/Stylet.Samples.ModelValidation/packages.config
index eb4adab..22e5475 100644
--- a/Samples/Stylet.Samples.ModelValidation/packages.config
+++ b/Samples/Stylet.Samples.ModelValidation/packages.config
@@ -17,7 +17,7 @@
   <package id="System.IO.Compression" version="4.3.0" targetFramework="net45" />
   <package id="System.Linq" version="4.3.0" targetFramework="net45" />
   <package id="System.Linq.Expressions" version="4.3.0" targetFramework="net45" />
-  <package id="System.Net.Http" version="4.3.0" targetFramework="net45" />
+  <package id="System.Net.Http" version="4.3.4" targetFramework="net45" />
   <package id="System.Net.Primitives" version="4.3.0" targetFramework="net45" />
   <package id="System.ObjectModel" version="4.3.0" targetFramework="net45" />
   <package id="System.Reflection" version="4.3.0" targetFramework="net45" />