diff --git a/src/Client.OSX/packages.config b/src/Client.OSX/packages.config
index 3e16dc3..6d420e0 100644
--- a/src/Client.OSX/packages.config
+++ b/src/Client.OSX/packages.config
@@ -10,6 +10,6 @@
   <package id="System.Runtime" version="4.3.0" targetFramework="xamarinmac20" />
   <package id="System.Runtime.CompilerServices.Unsafe" version="4.4.0" targetFramework="xamarinmac20" />
   <package id="System.Runtime.Serialization.Primitives" version="4.3.0" targetFramework="xamarinmac20" />
-  <package id="System.ServiceModel.Primitives" version="4.3.0" targetFramework="xamarinmac20" />
+  <package id="System.ServiceModel.Primitives" version="4.3.3" targetFramework="xamarinmac20" />
   <package id="System.Xml.XmlSerializer" version="4.3.0" targetFramework="xamarinmac20" />
 </packages>
\ No newline at end of file