diff --git a/PusherClient.Tests.Utilities/packages.config b/PusherClient.Tests.Utilities/packages.config
index 5b0a3421..14462c16 100644
--- a/PusherClient.Tests.Utilities/packages.config
+++ b/PusherClient.Tests.Utilities/packages.config
@@ -10,7 +10,7 @@
   <package id="System.Runtime" version="4.3.0" targetFramework="net45" />
   <package id="System.Runtime.Extensions" version="4.3.0" targetFramework="net45" />
   <package id="System.Runtime.InteropServices" 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="WebSocket4Net" version="0.15.2" targetFramework="net45" />
 </packages>
\ No newline at end of file