diff --git a/test/netstd/Client/Client.csproj b/test/netstd/Client/Client.csproj
index 4482f35..1ae67fa 100644
--- a/test/netstd/Client/Client.csproj
+++ b/test/netstd/Client/Client.csproj
@@ -37,7 +37,7 @@
   <ItemGroup>
     <PackageReference Include="System.Net.Http.WinHttpHandler" Version="7.0.0" />
     <PackageReference Include="System.Runtime.Serialization.Primitives" Version="[4.3,)" />
-    <PackageReference Include="System.ServiceModel.Primitives" Version="4.10.0" />
+    <PackageReference Include="System.ServiceModel.Primitives" Version="6.0.0" />
     <PackageReference Include="System.Threading" Version="[4.3,)" />
   </ItemGroup>