diff --git a/Sigma.Tests.Internals.WPF/packages.config b/Sigma.Tests.Internals.WPF/packages.config
index 30115dc..678bbee 100644
--- a/Sigma.Tests.Internals.WPF/packages.config
+++ b/Sigma.Tests.Internals.WPF/packages.config
@@ -32,7 +32,7 @@
   <package id="System.Runtime.InteropServices.RuntimeInformation" version="4.3.0" targetFramework="net46" />
   <package id="System.Runtime.Serialization.Formatters" version="4.3.0" targetFramework="net46" />
   <package id="System.Runtime.Serialization.Primitives" version="4.3.0" targetFramework="net46" />
-  <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="net46" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net46" />
   <package id="System.Threading" version="4.3.0" targetFramework="net46" />
   <package id="System.Threading.Thread" version="4.3.0" targetFramework="net46" />
   <package id="System.Threading.Timer" version="4.3.0" targetFramework="net46" />