diff --git a/Tutorial.iOS/packages.config b/Tutorial.iOS/packages.config
index 10252a1..8486892 100644
--- a/Tutorial.iOS/packages.config
+++ b/Tutorial.iOS/packages.config
@@ -109,7 +109,7 @@
   <package id="System.Security.SecureString" 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.Tasks.Parallel" version="4.3.0" targetFramework="xamarinios10" />