diff --git a/appveyor.yml b/appveyor.yml
index 10a8ab93..6a521dac 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 0.5.{build}
+version: 0.19.{build}
 
 # temporary fix for nuget connectivity issues 
 hosts: 
diff --git a/source/nanoFramework.Tools.DebugLibrary.Net/nanoFramework.Tools.DebugLibrary.Net.csproj b/source/nanoFramework.Tools.DebugLibrary.Net/nanoFramework.Tools.DebugLibrary.Net.csproj
index 8d968fae..8f6d0b1a 100644
--- a/source/nanoFramework.Tools.DebugLibrary.Net/nanoFramework.Tools.DebugLibrary.Net.csproj
+++ b/source/nanoFramework.Tools.DebugLibrary.Net/nanoFramework.Tools.DebugLibrary.Net.csproj
@@ -16,7 +16,7 @@
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
     <PackageId>nanoFramework.Tools.Debugger.Net</PackageId>
-    <PackageVersion>0.4.0-preview018</PackageVersion>
+    <PackageVersion>0.4.0-preview019</PackageVersion>
     <Description>This .NET library provides a debug client for nanoFramework devices using USB or Serial connection to a board.</Description>
     <Authors>nanoFramework project contributors</Authors>
     <Title>nanoFramework debug library for .NET</Title>
diff --git a/source/nanoFramework.Tools.DebugLibrary.UWP/nanoFramework.Tools.DebugLibrary.UWP.csproj b/source/nanoFramework.Tools.DebugLibrary.UWP/nanoFramework.Tools.DebugLibrary.UWP.csproj
index 4f31303a..04b2355e 100644
--- a/source/nanoFramework.Tools.DebugLibrary.UWP/nanoFramework.Tools.DebugLibrary.UWP.csproj
+++ b/source/nanoFramework.Tools.DebugLibrary.UWP/nanoFramework.Tools.DebugLibrary.UWP.csproj
@@ -17,7 +17,7 @@
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <PackageId>nanoFramework.Tools.Debugger.UWP</PackageId>
-    <PackageVersion>0.4.0-preview018</PackageVersion>
+    <PackageVersion>0.4.0-preview019</PackageVersion>
     <Description>This UWP library provides a debug client for nanoFramework devices using USB or Serial connection to a board.</Description>
     <Authors>nanoFramework project contributors</Authors>
     <Title>nanoFramework debug library for UWP</Title>