diff --git a/048rtmontecarlo-script/packages.config b/048rtmontecarlo-script/packages.config
index dd14f74..aedb100 100644
--- a/048rtmontecarlo-script/packages.config
+++ b/048rtmontecarlo-script/packages.config
@@ -55,7 +55,7 @@
   <package id="System.Text.Encoding" version="4.3.0" targetFramework="net46" />
   <package id="System.Text.Encoding.CodePages" version="4.5.0-preview1-26216-02" 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" />
+  <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.Tasks" version="4.3.0" targetFramework="net46" />
   <package id="System.Threading.Tasks.Parallel" version="4.3.0" targetFramework="net46" />