diff --git a/components/editorControls/umbraco.editorControls.csproj b/components/editorControls/umbraco.editorControls.csproj
index e640650def..61d20e5262 100644
--- a/components/editorControls/umbraco.editorControls.csproj
+++ b/components/editorControls/umbraco.editorControls.csproj
@@ -123,7 +123,9 @@
       <HintPath>..\..\foreign dlls\System.Web.Abstractions.dll</HintPath>
       <RequiredTargetFramework>3.5</RequiredTargetFramework>
     </Reference>
-    <Reference Include="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
+    <Reference Include="System.Web.Extensions">
+      <RequiredTargetFramework>3.5</RequiredTargetFramework>
+    </Reference>
     <Reference Include="System.Windows.Forms">
       <Name>System.Windows.Forms</Name>
     </Reference>
diff --git a/components/macroRenderings/umbraco.macroRenderings.csproj b/components/macroRenderings/umbraco.macroRenderings.csproj
index f2e2257561..3742f21607 100644
--- a/components/macroRenderings/umbraco.macroRenderings.csproj
+++ b/components/macroRenderings/umbraco.macroRenderings.csproj
@@ -95,7 +95,9 @@
     <Reference Include="System.Web">
       <Name>System.Web</Name>
     </Reference>
-    <Reference Include="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
+    <Reference Include="System.Web.Extensions">
+      <RequiredTargetFramework>3.5</RequiredTargetFramework>
+    </Reference>
     <Reference Include="System.Xml">
       <Name>System.XML</Name>
     </Reference>
diff --git a/components/umbraco.controls/umbraco.controls.csproj b/components/umbraco.controls/umbraco.controls.csproj
index 79d3808958..14e67319c4 100644
--- a/components/umbraco.controls/umbraco.controls.csproj
+++ b/components/umbraco.controls/umbraco.controls.csproj
@@ -52,7 +52,9 @@
     <Reference Include="System.Data" />
     <Reference Include="System.Drawing" />
     <Reference Include="System.Web" />
-    <Reference Include="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
+    <Reference Include="System.Web.Extensions">
+      <RequiredTargetFramework>3.5</RequiredTargetFramework>
+    </Reference>
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
diff --git a/foreign dlls/AjaxControlToolkit.dll b/foreign dlls/AjaxControlToolkit.dll
index 1ff944f5b2..1456df15ab 100644
Binary files a/foreign dlls/AjaxControlToolkit.dll and b/foreign dlls/AjaxControlToolkit.dll differ
diff --git a/umbraco/presentation/umbraco.presentation.csproj b/umbraco/presentation/umbraco.presentation.csproj
index 5c5dd56b2b..e6ac714369 100644
--- a/umbraco/presentation/umbraco.presentation.csproj
+++ b/umbraco/presentation/umbraco.presentation.csproj
@@ -119,12 +119,8 @@
       <HintPath>..\..\foreign dlls\System.Web.Abstractions.dll</HintPath>
       <RequiredTargetFramework>3.5</RequiredTargetFramework>
     </Reference>
-    <Reference Include="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
-      <RequiredTargetFramework>3.5</RequiredTargetFramework>
-    </Reference>
-    <Reference Include="System.Web.Extensions.Design, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
-      <RequiredTargetFramework>3.5</RequiredTargetFramework>
-    </Reference>
+    <Reference Include="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
+    <Reference Include="System.Web.Extensions.Design, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
     <Reference Include="System.Web.Services">
       <Name>System.Web.Services</Name>
     </Reference>