diff --git a/src/Cake.ActiveDirectory.Tests/packages.config b/src/Cake.ActiveDirectory.Tests/packages.config
index 9793ac9..58357e9 100644
--- a/src/Cake.ActiveDirectory.Tests/packages.config
+++ b/src/Cake.ActiveDirectory.Tests/packages.config
@@ -44,7 +44,7 @@
   <package id="System.Security.Cryptography.X509Certificates" version="4.3.2" targetFramework="net46" />
   <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" />
+  <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.Extensions" version="4.4.0" targetFramework="net46" />