diff --git a/Showcases/SimpleChartDemo/SimpleChartDemo/packages.config b/Showcases/SimpleChartDemo/SimpleChartDemo/packages.config
index c5f2695..704bf3a 100644
--- a/Showcases/SimpleChartDemo/SimpleChartDemo/packages.config
+++ b/Showcases/SimpleChartDemo/SimpleChartDemo/packages.config
@@ -55,7 +55,7 @@
   <package id="System.Security.Cryptography.Xml" version="4.5.0" targetFramework="net461" />
   <package id="System.Security.Permissions" version="4.5.0" targetFramework="net461" />
   <package id="System.Security.Principal.Windows" version="4.5.0" targetFramework="net461" />
-  <package id="System.ServiceModel.Duplex" version="4.4.1" targetFramework="net461" />
+  <package id="System.ServiceModel.Duplex" version="4.4.4" targetFramework="net461" />
   <package id="System.ServiceModel.Http" version="4.4.1" targetFramework="net461" />
   <package id="System.ServiceModel.NetTcp" version="4.4.1" targetFramework="net461" />
   <package id="System.ServiceModel.Primitives" version="4.4.1" targetFramework="net461" />