diff --git a/CoAP.Example/CoAP.Client/packages.config b/CoAP.Example/CoAP.Client/packages.config
index 7d13116..73bf69d 100644
--- a/CoAP.Example/CoAP.Client/packages.config
+++ b/CoAP.Example/CoAP.Client/packages.config
@@ -30,7 +30,7 @@
   <package id="System.Runtime.Numerics" version="4.3.0" targetFramework="net45" />
   <package id="System.Text.Encoding" version="4.3.0" targetFramework="net45" />
   <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net45" />
-  <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="net45" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net45" />
   <package id="System.Threading" version="4.3.0" targetFramework="net45" />
   <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net45" />
   <package id="System.Xml.ReaderWriter" version="4.3.0" targetFramework="net45" requireReinstallation="true" />