diff --git a/TCP/packages.config b/TCP/packages.config
index 8c3fe21..b320a16 100644
--- a/TCP/packages.config
+++ b/TCP/packages.config
@@ -42,7 +42,7 @@
   <package id="System.Security.Cryptography.X509Certificates" version="4.3.0" targetFramework="net462" />
   <package id="System.Text.Encoding" version="4.3.0" targetFramework="net462" />
   <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net462" />
-  <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="net462" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net462" />
   <package id="System.Threading" version="4.3.0" targetFramework="net462" />
   <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net462" />
   <package id="System.Threading.Timer" version="4.3.0" targetFramework="net462" />