diff --git a/src/unQuery.Tests/packages.config b/src/unQuery.Tests/packages.config
index f355f23..5fb03be 100644
--- a/src/unQuery.Tests/packages.config
+++ b/src/unQuery.Tests/packages.config
@@ -2,7 +2,7 @@
 <packages>
   <package id="NUnit" version="3.12.0" targetFramework="net472" />
   <package id="System.Configuration.ConfigurationManager" version="4.6.0" targetFramework="net472" />
-  <package id="System.Data.SqlClient" version="4.7.0" targetFramework="net472" />
+  <package id="System.Data.SqlClient" version="4.8.6" targetFramework="net472" />
   <package id="System.Security.AccessControl" version="4.6.0" targetFramework="net472" />
   <package id="System.Security.Permissions" version="4.6.0" targetFramework="net472" />
   <package id="System.Security.Principal.Windows" version="4.6.0" targetFramework="net472" />
diff --git a/src/unQuery.Tests/unQuery.Tests.csproj b/src/unQuery.Tests/unQuery.Tests.csproj
index a5847e2..7a46726 100644
--- a/src/unQuery.Tests/unQuery.Tests.csproj
+++ b/src/unQuery.Tests/unQuery.Tests.csproj
@@ -48,8 +48,9 @@
     <Reference Include="System.Core" />
     <Reference Include="System.Data" />
     <Reference Include="System.Data.OracleClient" />
-    <Reference Include="System.Data.SqlClient, Version=4.6.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>..\..\packages\System.Data.SqlClient.4.7.0\lib\net461\System.Data.SqlClient.dll</HintPath>
+    <Reference Include="System.Data.SqlClient, Version=4.6.1.6, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+      <HintPath>..\..\packages\System.Data.SqlClient.4.8.6\lib\net461\System.Data.SqlClient.dll</HintPath>
+      <Private>True</Private>
     </Reference>
     <Reference Include="System.Drawing" />
     <Reference Include="System.Net" />