diff --git a/src/Umbraco.Web/Umbraco.Web.csproj b/src/Umbraco.Web/Umbraco.Web.csproj
index e5a99c0fc9..90624df5f2 100644
--- a/src/Umbraco.Web/Umbraco.Web.csproj
+++ b/src/Umbraco.Web/Umbraco.Web.csproj
@@ -135,8 +135,8 @@
     <Reference Include="Microsoft.AspNet.Identity.Owin, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.AspNet.Identity.Owin.2.2.2\lib\net45\Microsoft.AspNet.Identity.Owin.dll</HintPath>
     </Reference>
-    <Reference Include="Microsoft.AspNet.SignalR.Core, Version=2.3.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
-      <HintPath>..\packages\Microsoft.AspNet.SignalR.Core.2.3.0\lib\net45\Microsoft.AspNet.SignalR.Core.dll</HintPath>
+    <Reference Include="Microsoft.AspNet.SignalR.Core, Version=2.4.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
+      <HintPath>..\packages\Microsoft.AspNet.SignalR.Core.2.4.1\lib\net45\Microsoft.AspNet.SignalR.Core.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
     <Reference Include="Microsoft.Owin, Version=4.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
@@ -193,6 +193,7 @@
       <HintPath>..\packages\Microsoft.AspNet.WebApi.Client.5.2.7\lib\net45\System.Net.Http.Formatting.dll</HintPath>
     </Reference>
     <Reference Include="System.Runtime.Serialization" />
+    <Reference Include="System.Security" />
     <Reference Include="System.ServiceModel" />
     <Reference Include="System.Threading.Tasks.Dataflow, Version=4.6.3.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\System.Threading.Tasks.Dataflow.4.9.0\lib\portable-net45+win8+wpa81\System.Threading.Tasks.Dataflow.dll</HintPath>
diff --git a/src/Umbraco.Web/packages.config b/src/Umbraco.Web/packages.config
index ebf4af0d80..06bfad4856 100644
--- a/src/Umbraco.Web/packages.config
+++ b/src/Umbraco.Web/packages.config
@@ -11,7 +11,7 @@
   <package id="Microsoft.AspNet.Identity.Owin" version="2.2.2" targetFramework="net452" />
   <package id="Microsoft.AspNet.Mvc" version="5.2.7" targetFramework="net452" />
   <package id="Microsoft.AspNet.Razor" version="3.2.7" targetFramework="net452" />
-  <package id="Microsoft.AspNet.SignalR.Core" version="2.3.0" targetFramework="net452" />
+  <package id="Microsoft.AspNet.SignalR.Core" version="2.4.1" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebApi" version="5.2.7" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebApi.Client" version="5.2.7" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebApi.Core" version="5.2.7" targetFramework="net452" />