diff --git a/PhysicsFormulae.Compiler/packages.config b/PhysicsFormulae.Compiler/packages.config
index a898dab..2f30b00 100644
--- a/PhysicsFormulae.Compiler/packages.config
+++ b/PhysicsFormulae.Compiler/packages.config
@@ -32,7 +32,7 @@
   <package id="System.Runtime.Numerics" version="4.3.0" targetFramework="net452" />
   <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" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net452" />
   <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" />