diff --git a/DnsServerApp/DnsServerApp.csproj b/DnsServerApp/DnsServerApp.csproj
index 37f991af..107f4c77 100644
--- a/DnsServerApp/DnsServerApp.csproj
+++ b/DnsServerApp/DnsServerApp.csproj
@@ -37,12 +37,6 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
-    <Reference Include="System.Core" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Data" />
-    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />
diff --git a/DnsServerCore/DnsServerCore.csproj b/DnsServerCore/DnsServerCore.csproj
index a66d692e..63e3cf1b 100644
--- a/DnsServerCore/DnsServerCore.csproj
+++ b/DnsServerCore/DnsServerCore.csproj
@@ -36,9 +36,6 @@
       <HintPath>..\..\..\Reference\Newtonsoft.Json\Net40\Newtonsoft.Json.dll</HintPath>
     </Reference>
     <Reference Include="System" />
-    <Reference Include="System.Core" />
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Runtime.Serialization" />
     <Reference Include="TechnitiumLibrary.IO, Version=2.3.2.0, Culture=neutral, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
       <HintPath>..\..\TechnitiumLibrary\bin\TechnitiumLibrary.IO.dll</HintPath>
diff --git a/DnsService/DnsService.csproj b/DnsService/DnsService.csproj
index 0c27ae83..870b08bc 100644
--- a/DnsService/DnsService.csproj
+++ b/DnsService/DnsService.csproj
@@ -38,14 +38,7 @@
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Configuration.Install" />
-    <Reference Include="System.Core" />
-    <Reference Include="System.Management" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Data" />
     <Reference Include="System.ServiceProcess" />
-    <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="ProjectInstaller.cs">