diff --git a/2.5DHero.sln b/2.5DHero.sln
index 123169ab3..4d3182749 100644
--- a/2.5DHero.sln
+++ b/2.5DHero.sln
@@ -1,12 +1,14 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.27004.2005
+VisualStudioVersion = 15.0.27130.2026
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "2.5DHero", "2.5DHero\2.5DHero\2.5DHero.vbproj", "{2AAF65BE-C81D-4663-ABF4-E2E09B16E12F}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Kolben", "kolben\Kolben\Kolben.csproj", "{ED665F9B-07F4-4415-BD72-A728CF1EA909}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "lib", "lib", "{3CE8099E-129D-40F9-8D23-005DFF32E2A2}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -35,6 +37,9 @@ Global
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{ED665F9B-07F4-4415-BD72-A728CF1EA909} = {3CE8099E-129D-40F9-8D23-005DFF32E2A2}
+	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {8FE3951F-DE18-41FF-A035-32DF597A91F2}
 	EndGlobalSection