diff --git a/src/SFA.DAS.Employer.Aan.Web.UnitTests/SFA.DAS.Employer.Aan.Web.UnitTests.csproj b/src/SFA.DAS.Employer.Aan.Web.UnitTests/SFA.DAS.Employer.Aan.Web.UnitTests.csproj
index 79885c36..1b9c39c8 100644
--- a/src/SFA.DAS.Employer.Aan.Web.UnitTests/SFA.DAS.Employer.Aan.Web.UnitTests.csproj
+++ b/src/SFA.DAS.Employer.Aan.Web.UnitTests/SFA.DAS.Employer.Aan.Web.UnitTests.csproj
@@ -27,6 +27,7 @@
 			<PrivateAssets>all</PrivateAssets>
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>
+		<PackageReference Include="System.Security.Cryptography.Pkcs" Version="7.0.2" />
 	</ItemGroup>
 
 	<ItemGroup>