diff --git a/tests/FilterLists.Services.Tests/FilterLists.Services.Tests.csproj b/tests/FilterLists.Services.Tests/FilterLists.Services.Tests.csproj
index e542a8acc..60c7a1727 100644
--- a/tests/FilterLists.Services.Tests/FilterLists.Services.Tests.csproj
+++ b/tests/FilterLists.Services.Tests/FilterLists.Services.Tests.csproj
@@ -6,6 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Moq" Version="4.7.142" />
     <PackageReference Include="xunit" Version="2.3.0" />
   </ItemGroup>