diff --git a/Chapter.14/iOS/packages.config b/Chapter.14/iOS/packages.config
index cd81ca09..4f941053 100644
--- a/Chapter.14/iOS/packages.config
+++ b/Chapter.14/iOS/packages.config
@@ -44,7 +44,7 @@
   <package id="System.Security.Cryptography.X509Certificates" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Text.Encoding" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="xamarinios10" />
-  <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="xamarinios10" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="xamarinios10" />
   <package id="System.Threading" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Threading.Tasks" version="4.3.0" targetFramework="xamarinios10" />
   <package id="System.Threading.Timer" version="4.3.0" targetFramework="xamarinios10" />