diff --git a/Ak.Framework/Ak.Framework.Morphology/packages.config b/Ak.Framework/Ak.Framework.Morphology/packages.config
index 99b4de7..165447c 100644
--- a/Ak.Framework/Ak.Framework.Morphology/packages.config
+++ b/Ak.Framework/Ak.Framework.Morphology/packages.config
@@ -68,7 +68,7 @@
   <package id="System.Runtime.Numerics" version="4.3.0" targetFramework="net45" />
   <package id="System.Text.Encoding" version="4.3.0" targetFramework="net45" />
   <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net45" />
-  <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="net45" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net45" />
   <package id="System.Threading" version="4.3.0" targetFramework="net45" />
   <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net45" />
   <package id="System.Xml.ReaderWriter" version="4.3.0" targetFramework="net45" />