diff -ur a/Zeitgeist/Zeitgeist.csproj b/Zeitgeist/Zeitgeist.csproj
--- a/Zeitgeist/Zeitgeist.csproj	2011-05-09 16:24:12.000000000 -0500
+++ b/Zeitgeist/Zeitgeist.csproj	2015-02-25 11:13:13.360309437 -0600
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>