diff --git a/TestServer/packages.config b/TestServer/packages.config
index 6d037ac..e3324c0 100644
--- a/TestServer/packages.config
+++ b/TestServer/packages.config
@@ -46,7 +46,7 @@
   <package id="System.Security.Cryptography.X509Certificates" version="4.3.0" targetFramework="net462" />
   <package id="System.Text.Encoding" version="4.3.0" targetFramework="net452" />
   <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net452" />
-  <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="net452" requireReinstallation="true" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net452" requireReinstallation="true" />
   <package id="System.Threading" version="4.3.0" targetFramework="net452" />
   <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net452" />
   <package id="System.Threading.Timer" version="4.3.0" targetFramework="net452" />