diff --git a/src/DigitalData.EmailProfiler.Domain/DigitalData.EmailProfiler.Domain.csproj b/src/DigitalData.EmailProfiler.Domain/DigitalData.EmailProfiler.Domain.csproj
index fa71b7a..13604a5 100644
--- a/src/DigitalData.EmailProfiler.Domain/DigitalData.EmailProfiler.Domain.csproj
+++ b/src/DigitalData.EmailProfiler.Domain/DigitalData.EmailProfiler.Domain.csproj
@@ -6,4 +6,8 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="MediatR" Version="12.2.0" />
+  </ItemGroup>
+
 </Project>