diff --git a/Build/MQTTnet.AspNetCore.nuspec b/Build/MQTTnet.AspNetCore.nuspec
index c95f21f..9b6166d 100644
--- a/Build/MQTTnet.AspNetCore.nuspec
+++ b/Build/MQTTnet.AspNetCore.nuspec
@@ -11,10 +11,10 @@
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <description>This is a support library to integrate MQTTnet into AspNetCore.</description>
     <releaseNotes>For release notes please go to MQTTnet release notes (https://www.nuget.org/packages/MQTTnet/).</releaseNotes>
-    <copyright>Copyright Christian Kratky 2016-2018</copyright>
+    <copyright>Copyright Christian Kratky 2016-2019</copyright>
     <tags>MQTT Message Queue Telemetry Transport MQTTClient MQTTServer Server MQTTBroker Broker NETStandard IoT InternetOfThings Messaging Hardware Arduino Sensor Actuator M2M ESP Smart Home Cities Automation Xamarin</tags>
     <dependencies>
-      <dependency id="MQTTnet" version="$nugetVersion" />
+      <dependency id="MQTTnet" version="3.0.0-alpha3" />
 
       <dependency id="Microsoft.AspNetCore.Connections.Abstractions" version="2.1.3" />
       <dependency id="Microsoft.AspNetCore.WebSockets" version="2.1.1" />
diff --git a/Build/MQTTnet.Extensions.ManagedClient.nuspec b/Build/MQTTnet.Extensions.ManagedClient.nuspec
index bf3fa15..5c9c72e 100644
--- a/Build/MQTTnet.Extensions.ManagedClient.nuspec
+++ b/Build/MQTTnet.Extensions.ManagedClient.nuspec
@@ -11,10 +11,10 @@
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <description>This is an extension library which provides a managed MQTT client with additional features using MQTTnet.</description>
     <releaseNotes>For release notes please go to MQTTnet release notes (https://www.nuget.org/packages/MQTTnet/).</releaseNotes>
-    <copyright>Copyright Christian Kratky 2016-2018</copyright>
+    <copyright>Copyright Christian Kratky 2016-2019</copyright>
     <tags>MQTT Message Queue Telemetry Transport MQTTClient MQTTServer Server MQTTBroker Broker NETStandard IoT InternetOfThings Messaging Hardware Arduino Sensor Actuator M2M ESP Smart Home Cities Automation Xamarin</tags> 
     <dependencies>
-      <dependency id="MQTTnet" version="$nugetVersion" />
+      <dependency id="MQTTnet" version="3.0.0-alpha3" />
     </dependencies>
   </metadata>
 
@@ -37,4 +37,4 @@
     <file src="..\Source\MQTTnet.Extensions.ManagedClient\bin\Release\netstandard2.0\MQTTnet.Extensions.ManagedClient.*" target="lib\net471\"/>
     <file src="..\Source\MQTTnet.Extensions.ManagedClient\bin\Release\netstandard2.0\MQTTnet.Extensions.ManagedClient.*" target="lib\net472\"/>
   </files>
-</package>
\ No newline at end of file
+</package>
diff --git a/Build/MQTTnet.Extensions.Rpc.nuspec b/Build/MQTTnet.Extensions.Rpc.nuspec
index afe9146..71afde0 100644
--- a/Build/MQTTnet.Extensions.Rpc.nuspec
+++ b/Build/MQTTnet.Extensions.Rpc.nuspec
@@ -11,10 +11,10 @@
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <description>This is an extension library which allows executing synchronous device calls including a response using MQTTnet.</description>
     <releaseNotes>For release notes please go to MQTTnet release notes (https://www.nuget.org/packages/MQTTnet/).</releaseNotes>
-    <copyright>Copyright Christian Kratky 2016-2018</copyright>
+    <copyright>Copyright Christian Kratky 2016-2019</copyright>
     <tags>MQTT Message Queue Telemetry Transport MQTTClient MQTTServer Server MQTTBroker Broker NETStandard IoT InternetOfThings Messaging Hardware Arduino Sensor Actuator M2M ESP Smart Home Cities Automation Xamarin</tags> 
     <dependencies>
-      <dependency id="MQTTnet" version="$nugetVersion" />
+      <dependency id="MQTTnet" version="3.0.0-alpha3" />
     </dependencies>
   </metadata>
 
@@ -37,4 +37,4 @@
     <file src="..\Source\MQTTnet.Extensions.Rpc\bin\Release\netstandard2.0\MQTTnet.Extensions.Rpc.*" target="lib\net471\"/>
     <file src="..\Source\MQTTnet.Extensions.Rpc\bin\Release\netstandard2.0\MQTTnet.Extensions.Rpc.*" target="lib\net472\"/>
   </files>
-</package>
\ No newline at end of file
+</package>
diff --git a/Build/MQTTnet.NETStandard.nuspec b/Build/MQTTnet.NETStandard.nuspec
new file mode 100644
index 0000000..59fa4eb
--- /dev/null
+++ b/Build/MQTTnet.NETStandard.nuspec
@@ -0,0 +1,36 @@
+<?xml version="1.0"?>
+<package >
+  <metadata>
+    <id>MQTTnet.NETStandard</id>
+    <version>0.0.0</version>
+    <authors>Christian Kratky</authors>
+    <owners>Christian Kratky</owners>
+    <licenseUrl>https://github.com/chkr1011/MQTTnet/blob/master/LICENSE</licenseUrl>
+    <projectUrl>https://github.com/chkr1011/MQTTnet</projectUrl>
+    <iconUrl>https://raw.githubusercontent.com/chkr1011/MQTTnet/master/Images/Logo_128x128.png</iconUrl>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <description>MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker). This package contains the .NET Standard version of the library only.</description>
+    <releaseNotes>For release notes please go to MQTTnet release notes (https://www.nuget.org/packages/MQTTnet/).</releaseNotes>
+    <copyright>Copyright Christian Kratky 2016-2019</copyright>
+    <tags>MQTT Message Queue Telemetry Transport MQTTClient MQTTServer Server MQTTBroker Broker NETStandard IoT InternetOfThings Messaging Hardware Arduino Sensor Actuator M2M ESP Smart Home Cities Automation Xamarin</tags> 
+    <dependencies>
+      <group targetFramework="netstandard1.3">
+        <dependency id="NETStandard.Library" version="1.3.0" />
+        <dependency id="System.Net.Security" version="4.3.2" />
+        <dependency id="System.Net.WebSockets" version="4.3.0" />
+        <dependency id="System.Net.WebSockets.Client" version="4.3.2" />      
+      </group>
+      <group targetFramework="netstandard2.0">
+        <dependency id="NETStandard.Library" version="2.0.0" />
+        <dependency id="System.Net.Security" version="4.3.2" />
+        <dependency id="System.Net.WebSockets" version="4.3.0" />
+        <dependency id="System.Net.WebSockets.Client" version="4.3.2" />
+      </group>
+    </dependencies>
+  </metadata>
+
+  <files>
+    <file src="..\Source\MQTTnet\bin\Release\netstandard1.3\MQTTnet.*" target="lib\netstandard1.3\"/>   
+    <file src="..\Source\MQTTnet\bin\Release\netstandard2.0\MQTTnet.*" target="lib\netstandard2.0\"/>
+  </files>
+</package>
\ No newline at end of file
diff --git a/Build/MQTTnet.nuspec b/Build/MQTTnet.nuspec
index 4a17db2..8d0087a 100644
--- a/Build/MQTTnet.nuspec
+++ b/Build/MQTTnet.nuspec
@@ -12,6 +12,7 @@
     <description>MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker).</description>
     <releaseNotes> * [Core] Added support for MQTTv5 packages.
 * [Core] Performance improvements (removed several exceptions).
+* [Core] Removed obsolete methods.
 * [Core] Fixed a memory leak when processing lots of messages (thanks to @tschanko)
 * [Core] Added more overloads for MQTT factory.
 * [Core] The client password is now hidden from the logs (replaced with **** if set).
@@ -36,7 +37,7 @@
 
 * [Note] Due to MQTTv5 a lot of new classes were introduced. This required adding new namespaces as well. Most classes are backward compatible but new namespaces must be added.
     </releaseNotes>
-    <copyright>Copyright Christian Kratky 2016-2018</copyright>
+    <copyright>Copyright Christian Kratky 2016-2019</copyright>
     <tags>MQTT Message Queue Telemetry Transport MQTTClient MQTTServer Server MQTTBroker Broker NETStandard IoT InternetOfThings Messaging Hardware Arduino Sensor Actuator M2M ESP Smart Home Cities Automation Xamarin</tags> 
     <dependencies>
       <group targetFramework="netstandard1.3">