diff --git a/test/API.Test/packages.config b/test/API.Test/packages.config
index 8d112267..b96f52d7 100644
--- a/test/API.Test/packages.config
+++ b/test/API.Test/packages.config
@@ -61,7 +61,7 @@
   <package id="System.Security.Cryptography.X509Certificates" version="4.3.0" targetFramework="net472" />
   <package id="System.Text.Encoding" version="4.3.0" targetFramework="net472" />
   <package id="System.Text.Encoding.Extensions" version="4.3.0" targetFramework="net472" />
-  <package id="System.Text.RegularExpressions" version="4.3.0" targetFramework="net472" />
+  <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net472" />
   <package id="System.Threading" version="4.3.0" targetFramework="net472" />
   <package id="System.Threading.Tasks" version="4.3.0" targetFramework="net472" />
   <package id="System.Threading.Tasks.Extensions" version="4.5.2" targetFramework="net472" />