diff --git a/SweetLib.Demo/packages.config b/SweetLib.Demo/packages.config
index eb1edc5..c188883 100644
--- a/SweetLib.Demo/packages.config
+++ b/SweetLib.Demo/packages.config
@@ -42,7 +42,7 @@
   <package id="System.Security.Cryptography.X509Certificates" version="4.3.0" targetFramework="net46" requireReinstallation="true" />
   <package id="System.Text.Encoding" version="4.3.0" targetFramework="net46" />
   <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net46" />
-  <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="net46" requireReinstallation="true" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net46" requireReinstallation="true" />
   <package id="System.Threading" version="4.3.0" targetFramework="net46" />
   <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net46" />
   <package id="System.Threading.Timer" version="4.3.0" targetFramework="net46" />