diff --git a/test/FunctionalTests/Tests/DataServices/UnitTests/Client.TDD.Tests/packages.config b/test/FunctionalTests/Tests/DataServices/UnitTests/Client.TDD.Tests/packages.config
index 6f712c6604..67b2cfac3d 100644
--- a/test/FunctionalTests/Tests/DataServices/UnitTests/Client.TDD.Tests/packages.config
+++ b/test/FunctionalTests/Tests/DataServices/UnitTests/Client.TDD.Tests/packages.config
@@ -27,7 +27,7 @@
   <package id="System.Runtime.Numerics" version="4.3.0" targetFramework="net451" />
   <package id="System.Text.Encoding" version="4.3.0" targetFramework="net451" />
   <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net451" />
-  <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="net451" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net451" />
   <package id="System.Threading" version="4.3.0" targetFramework="net451" />
   <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net451" />
   <package id="System.Threading.Timer" version="4.3.0" targetFramework="net451" />