diff --git a/EnvelopeGenerator.Service/EnvelopeGenerator.Service.vbproj b/EnvelopeGenerator.Service/EnvelopeGenerator.Service.vbproj
index 7c4d2948..f9faacfa 100644
--- a/EnvelopeGenerator.Service/EnvelopeGenerator.Service.vbproj
+++ b/EnvelopeGenerator.Service/EnvelopeGenerator.Service.vbproj
@@ -235,6 +235,9 @@
     <Reference Include="System.Collections.Immutable, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\System.Collections.Immutable.8.0.0\lib\net462\System.Collections.Immutable.dll</HintPath>
     </Reference>
+    <Reference Include="System.ComponentModel.Annotations, Version=4.2.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.ComponentModel.Annotations.4.7.0\lib\net461\System.ComponentModel.Annotations.dll</HintPath>
+    </Reference>
     <Reference Include="System.ComponentModel.DataAnnotations" />
     <Reference Include="System.Configuration" />
     <Reference Include="System.Configuration.Install" />