diff --git a/CADability/CADability.csproj b/CADability/CADability.csproj
index c2aa7851..4604bee3 100644
--- a/CADability/CADability.csproj
+++ b/CADability/CADability.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
     <PackageId>CADability</PackageId>
-    <Version>1.7.1</Version>
+    <Version>1.8.0-preview.1</Version>
     <!-- Update this for each publish -->
     <Authors>FriendsOfCADability</Authors>
     <Description>CAD functionality for .NET</Description>