Index: Ringtoets/Piping/src/Ringtoets.Piping.Primitives/Ringtoets.Piping.Primitives.csproj
===================================================================
diff -u -rb1b25abeb595bff11389bbf0e695851995ef5221 -r23d1e296e2da4364fbfe346e68d582dfcf966bb0
--- Ringtoets/Piping/src/Ringtoets.Piping.Primitives/Ringtoets.Piping.Primitives.csproj	(.../Ringtoets.Piping.Primitives.csproj)	(revision b1b25abeb595bff11389bbf0e695851995ef5221)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Primitives/Ringtoets.Piping.Primitives.csproj	(.../Ringtoets.Piping.Primitives.csproj)	(revision 23d1e296e2da4364fbfe346e68d582dfcf966bb0)
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(SolutionDir)\build\Ringtoets.targets" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>