diff --git a/.gitignore b/.gitignore
index f0595cb6..71ed5b23 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,8 @@ AppPackages/
 _ReSharper.*
 *.ReSharper.user
 *.resharper.user
+project.lock.json
+*.xproj
 
 #NuGet
 packages
diff --git a/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.csproj b/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.csproj
index 39826abe..3bf026a8 100644
--- a/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.csproj
+++ b/Src/Newtonsoft.Json.Tests/Newtonsoft.Json.Tests.csproj
@@ -44,8 +44,8 @@
       <HintPath>..\packages\NUnit.2.6.2\lib\nunit.framework.dll</HintPath>
     </Reference>
     <Reference Include="System" />
-    <Reference Include="System.Collections.Immutable, Version=1.1.34.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>..\packages\System.Collections.Immutable.1.1.34-rc\lib\portable-net45+win8+wp8+wpa81\System.Collections.Immutable.dll</HintPath>
+    <Reference Include="System.Collections.Immutable, Version=1.1.36.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Collections.Immutable.1.1.36\lib\portable-net45+win8+wp8+wpa81\System.Collections.Immutable.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="System.ComponentModel.DataAnnotations" />
diff --git a/Src/Newtonsoft.Json.Tests/packages.config b/Src/Newtonsoft.Json.Tests/packages.config
index 591f8cec..b87dc088 100644
--- a/Src/Newtonsoft.Json.Tests/packages.config
+++ b/Src/Newtonsoft.Json.Tests/packages.config
@@ -3,5 +3,5 @@
   <package id="Autofac" version="3.5.0" targetFramework="net45" />
   <package id="FSharp.Core" version="4.0.0" targetFramework="net45" />
   <package id="NUnit" version="2.6.2" targetFramework="net45" />
-  <package id="System.Collections.Immutable" version="1.1.34-rc" targetFramework="net45" />
+  <package id="System.Collections.Immutable" version="1.1.36" targetFramework="net45" />
 </packages>
\ No newline at end of file