diff --git a/EnvelopeGenerator.Service/packages.config b/EnvelopeGenerator.Service/packages.config
index b3d22784..86eb10dc 100644
--- a/EnvelopeGenerator.Service/packages.config
+++ b/EnvelopeGenerator.Service/packages.config
@@ -27,6 +27,7 @@
   <package id="System.Buffers" version="4.6.0" targetFramework="net48" />
   <package id="System.CodeDom" version="8.0.0" targetFramework="net48" />
   <package id="System.Collections.Immutable" version="8.0.0" targetFramework="net48" />
+  <package id="System.ComponentModel.Annotations" version="4.7.0" targetFramework="net48" />
   <package id="System.Data.Odbc" version="6.0.1" targetFramework="net48" />
   <package id="System.IO.Packaging" version="8.0.1" targetFramework="net48" />
   <package id="System.Management" version="8.0.0" targetFramework="net48" />