diff --git a/README.md b/README.md
index 703b5c25..0e1f1a6b 100644
--- a/README.md
+++ b/README.md
@@ -553,6 +553,8 @@ Press F5 to start debugging.
 
 ## History
 
+2024-08-14: release 2.15: add alpha blending support. Parameter --default_alpha_mode (default OPAQUE, options OPAQUE/BLEND/MASK)
+
 2024-08-08: release 2.14.1: make zip releases smaller
 
 2024-08-08: release 2.14.0: 
diff --git a/src/pg2b3dm/pg2b3dm.csproj b/src/pg2b3dm/pg2b3dm.csproj
index 6670a3d1..ddedf204 100644
--- a/src/pg2b3dm/pg2b3dm.csproj
+++ b/src/pg2b3dm/pg2b3dm.csproj
@@ -6,10 +6,10 @@
 	<PackageOutputPath>./nupkg</PackageOutputPath>
 	<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
 	<ToolCommandName>pg2b3dm</ToolCommandName>
-	<Version>2.14.1</Version>
+	<Version>2.15.0</Version>
     <Description>Console tool for converting PostGIS geometries to 3D Tiles</Description>
-    <AssemblyVersion>2.14.1</AssemblyVersion>
-    <FileVersion>2.14.1</FileVersion>
+    <AssemblyVersion>2.15.0</AssemblyVersion>
+    <FileVersion>2.15.0</FileVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <Company>Geodan</Company>
@@ -17,7 +17,7 @@
     <PackageProjectUrl>https://github.com/geodan/pg2b3dm</PackageProjectUrl>
     <RepositoryUrl>https://github.com/geodan/pg2b3dm</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
-    <PackageReleaseNotes>Add TIN support</PackageReleaseNotes>
+    <PackageReleaseNotes>Add alpha blending support</PackageReleaseNotes>
     <PackageTags>3dtiles b3dm gltf cesium</PackageTags>
 	<ErrorOnDuplicatePublishOutputFiles>false</ErrorOnDuplicatePublishOutputFiles>
   </PropertyGroup>