diff --git a/src/MonoDevelop.WakaTime.csproj b/src/MonoDevelop.WakaTime.csproj
index 5f41b77..04d63a0 100644
--- a/src/MonoDevelop.WakaTime.csproj
+++ b/src/MonoDevelop.WakaTime.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>