diff --git a/samples/HttpSend/HttpSend.csproj b/samples/HttpSend/HttpSend.csproj
index 1172160..cdd4e08 100644
--- a/samples/HttpSend/HttpSend.csproj
+++ b/samples/HttpSend/HttpSend.csproj
@@ -6,10 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="McMaster.Extensions.CommandLineUtils" Version="2.2.5" />
-  </ItemGroup>
-
-  <ItemGroup>
+    <PackageReference Include="McMaster.Extensions.CommandLineUtils" Version="3.1.0" />
     <ProjectReference Include="..\..\src\CloudNative.CloudEvents\CloudNative.CloudEvents.csproj" />
     <ProjectReference Include="..\..\src\CloudNative.CloudEvents.NewtonsoftJson\CloudNative.CloudEvents.NewtonsoftJson.csproj" />
   </ItemGroup>
diff --git a/src/CloudNative.CloudEvents.Amqp/CloudNative.CloudEvents.Amqp.csproj b/src/CloudNative.CloudEvents.Amqp/CloudNative.CloudEvents.Amqp.csproj
index 867e838..01cf84f 100644
--- a/src/CloudNative.CloudEvents.Amqp/CloudNative.CloudEvents.Amqp.csproj
+++ b/src/CloudNative.CloudEvents.Amqp/CloudNative.CloudEvents.Amqp.csproj
@@ -7,11 +7,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AMQPNetLite" Version="2.1.5" />
-    <PackageReference Include="AMQPNetLite.Serialization" Version="2.1.5" />
-  </ItemGroup>
-
-  <ItemGroup>
+    <PackageReference Include="AMQPNetLite" Version="2.4.2" />
+    <PackageReference Include="AMQPNetLite.Serialization" Version="2.4.2" />
     <ProjectReference Include="..\CloudNative.CloudEvents\CloudNative.CloudEvents.csproj" />
   </ItemGroup>
 
diff --git a/src/CloudNative.CloudEvents.AspNetCore/CloudNative.CloudEvents.AspNetCore.csproj b/src/CloudNative.CloudEvents.AspNetCore/CloudNative.CloudEvents.AspNetCore.csproj
index 31692ce..c0007ef 100644
--- a/src/CloudNative.CloudEvents.AspNetCore/CloudNative.CloudEvents.AspNetCore.csproj
+++ b/src/CloudNative.CloudEvents.AspNetCore/CloudNative.CloudEvents.AspNetCore.csproj
@@ -6,11 +6,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.Http" Version="2.1.1" />
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.1.11" />
-  </ItemGroup>
-
-  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Http" Version="2.1.22" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Core" Version="2.1.16" />
     <ProjectReference Include="..\CloudNative.CloudEvents\CloudNative.CloudEvents.csproj" />
   </ItemGroup>
 
diff --git a/src/CloudNative.CloudEvents.Avro/CloudNative.CloudEvents.Avro.csproj b/src/CloudNative.CloudEvents.Avro/CloudNative.CloudEvents.Avro.csproj
index 7085393..a143f10 100644
--- a/src/CloudNative.CloudEvents.Avro/CloudNative.CloudEvents.Avro.csproj
+++ b/src/CloudNative.CloudEvents.Avro/CloudNative.CloudEvents.Avro.csproj
@@ -9,18 +9,10 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Apache.Avro" Version="1.9.1" />
-    <PackageReference Include="System.Memory" Version="4.5.3" />
-  </ItemGroup>
-
-  <ItemGroup>
+    <PackageReference Include="Apache.Avro" Version="1.10.2" />
     <ProjectReference Include="..\CloudNative.CloudEvents\CloudNative.CloudEvents.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Content Remove="AvroSchema.json" />
-  </ItemGroup>
-
   <ItemGroup>
     <EmbeddedResource Include="AvroSchema.json" />
   </ItemGroup>
diff --git a/src/CloudNative.CloudEvents.Kafka/CloudNative.CloudEvents.Kafka.csproj b/src/CloudNative.CloudEvents.Kafka/CloudNative.CloudEvents.Kafka.csproj
index 2805aa2..b2d4ed0 100644
--- a/src/CloudNative.CloudEvents.Kafka/CloudNative.CloudEvents.Kafka.csproj
+++ b/src/CloudNative.CloudEvents.Kafka/CloudNative.CloudEvents.Kafka.csproj
@@ -6,10 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Confluent.Kafka" Version="1.2.0" />
-  </ItemGroup>
-
-  <ItemGroup>
+    <PackageReference Include="Confluent.Kafka" Version="1.6.3" />
     <ProjectReference Include="..\CloudNative.CloudEvents\CloudNative.CloudEvents.csproj" />
   </ItemGroup>
 
diff --git a/src/CloudNative.CloudEvents.Mqtt/CloudNative.CloudEvents.Mqtt.csproj b/src/CloudNative.CloudEvents.Mqtt/CloudNative.CloudEvents.Mqtt.csproj
index 00e82ba..b42dc29 100644
--- a/src/CloudNative.CloudEvents.Mqtt/CloudNative.CloudEvents.Mqtt.csproj
+++ b/src/CloudNative.CloudEvents.Mqtt/CloudNative.CloudEvents.Mqtt.csproj
@@ -6,10 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MQTTnet" Version="2.8.4" />
-  </ItemGroup>
-
-  <ItemGroup>
+    <PackageReference Include="MQTTnet" Version="3.0.15" />
     <ProjectReference Include="..\CloudNative.CloudEvents\CloudNative.CloudEvents.csproj" />
   </ItemGroup>
 
diff --git a/src/CloudNative.CloudEvents.NewtonsoftJson/CloudNative.CloudEvents.NewtonsoftJson.csproj b/src/CloudNative.CloudEvents.NewtonsoftJson/CloudNative.CloudEvents.NewtonsoftJson.csproj
index e265bda..01d7446 100644
--- a/src/CloudNative.CloudEvents.NewtonsoftJson/CloudNative.CloudEvents.NewtonsoftJson.csproj
+++ b/src/CloudNative.CloudEvents.NewtonsoftJson/CloudNative.CloudEvents.NewtonsoftJson.csproj
@@ -7,10 +7,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-  </ItemGroup>
-
-  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <ProjectReference Include="..\CloudNative.CloudEvents\CloudNative.CloudEvents.csproj" />
   </ItemGroup>
+
 </Project>
diff --git a/src/CloudNative.CloudEvents.SystemTextJson/CloudNative.CloudEvents.SystemTextJson.csproj b/src/CloudNative.CloudEvents.SystemTextJson/CloudNative.CloudEvents.SystemTextJson.csproj
index 21523f6..d60723a 100644
--- a/src/CloudNative.CloudEvents.SystemTextJson/CloudNative.CloudEvents.SystemTextJson.csproj
+++ b/src/CloudNative.CloudEvents.SystemTextJson/CloudNative.CloudEvents.SystemTextJson.csproj
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Text.Json" Version="5.0.1" />
+    <PackageReference Include="System.Text.Json" Version="5.0.2" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/test/CloudNative.CloudEvents.UnitTests/CloudNative.CloudEvents.UnitTests.csproj b/test/CloudNative.CloudEvents.UnitTests/CloudNative.CloudEvents.UnitTests.csproj
index 7507968..93f20b1 100644
--- a/test/CloudNative.CloudEvents.UnitTests/CloudNative.CloudEvents.UnitTests.csproj
+++ b/test/CloudNative.CloudEvents.UnitTests/CloudNative.CloudEvents.UnitTests.csproj
@@ -6,15 +6,14 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.8.0" />
-    <PackageReference Include="MQTTnet" Version="2.8.4" />
-    <PackageReference Include="xunit" Version="2.3.1" />
+    <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
+    <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.console" Version="2.4.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/test/CloudNative.CloudEvents.UnitTests/Mqtt/MqttTest.cs b/test/CloudNative.CloudEvents.UnitTests/Mqtt/MqttTest.cs
index 7c45760..c4a5043 100644
--- a/test/CloudNative.CloudEvents.UnitTests/Mqtt/MqttTest.cs
+++ b/test/CloudNative.CloudEvents.UnitTests/Mqtt/MqttTest.cs
@@ -5,6 +5,8 @@
 using CloudNative.CloudEvents.NewtonsoftJson;
 using MQTTnet;
 using MQTTnet.Client;
+using MQTTnet.Client.Options;
+using MQTTnet.Client.Receiving;
 using MQTTnet.Server;
 using System;
 using System.Net.Mime;
@@ -59,8 +61,8 @@ namespace CloudNative.CloudEvents.Mqtt.UnitTests
 
             TaskCompletionSource<CloudEvent> tcs = new TaskCompletionSource<CloudEvent>();
             await client.ConnectAsync(options);
-            client.ApplicationMessageReceived += (sender, args) =>
-                tcs.SetResult(args.ApplicationMessage.ToCloudEvent(jsonEventFormatter));
+            client.ApplicationMessageReceivedHandler = new MqttApplicationMessageReceivedHandlerDelegate(
+                args => tcs.SetResult(args.ApplicationMessage.ToCloudEvent(jsonEventFormatter)));
 
             var result = await client.SubscribeAsync("abc");
             await client.PublishAsync(cloudEvent.ToMqttApplicationMessage(ContentMode.Structured, new JsonEventFormatter(), topic: "abc"));