diff --git a/README.md b/README.md
index d766599..4b6623f 100644
--- a/README.md
+++ b/README.md
@@ -306,6 +306,8 @@ Press F5 to start debugging.
 
 ## History
 
+2024-10-15: release 2.9.0: add tileset version option
+
 2024-08-01: release 2.8.3: fix release
 
 2024-08-01: release 2.8.2: fix for I3dm using rtc_center for high precision positions
diff --git a/src/i3dm.export.csproj b/src/i3dm.export.csproj
index e28cb72..52967f9 100644
--- a/src/i3dm.export.csproj
+++ b/src/i3dm.export.csproj
@@ -5,9 +5,9 @@
     <TargetFramework>net8.0</TargetFramework>
 	<ToolCommandName>i3dm.export</ToolCommandName>
 	<PackageOutputPath>./nupkg</PackageOutputPath>
-	<Version>2.8.3</Version>
-	<AssemblyVersion>2.8.3</AssemblyVersion>
-	<FileVersion>2.8.3</FileVersion>
+	<Version>2.9.0</Version>
+	<AssemblyVersion>2.9.0</AssemblyVersion>
+	<FileVersion>2.9.0</FileVersion>
 	<PackageProjectUrl>https://github.com/geodan/i3dm.export</PackageProjectUrl>
 	<RepositoryUrl>https://github.com/geodan/i3dm.export</RepositoryUrl>
 	<RepositoryType>git</RepositoryType>