diff --git a/src/ServerlessWorkflow.Sdk.Builders/ServerlessWorkflow.Sdk.Builders.csproj b/src/ServerlessWorkflow.Sdk.Builders/ServerlessWorkflow.Sdk.Builders.csproj
index cc0637e..f274db9 100644
--- a/src/ServerlessWorkflow.Sdk.Builders/ServerlessWorkflow.Sdk.Builders.csproj
+++ b/src/ServerlessWorkflow.Sdk.Builders/ServerlessWorkflow.Sdk.Builders.csproj
@@ -5,7 +5,7 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
 	<VersionPrefix>1.0.0</VersionPrefix>
-	<VersionSuffix>alpha6.1</VersionSuffix>
+	<VersionSuffix>alpha6.2</VersionSuffix>
 	<AssemblyVersion>$(VersionPrefix)</AssemblyVersion>
 	<FileVersion>$(VersionPrefix)</FileVersion>
 	<NeutralLanguage>en</NeutralLanguage>
diff --git a/src/ServerlessWorkflow.Sdk.IO/ServerlessWorkflow.Sdk.IO.csproj b/src/ServerlessWorkflow.Sdk.IO/ServerlessWorkflow.Sdk.IO.csproj
index f3977a5..83075ff 100644
--- a/src/ServerlessWorkflow.Sdk.IO/ServerlessWorkflow.Sdk.IO.csproj
+++ b/src/ServerlessWorkflow.Sdk.IO/ServerlessWorkflow.Sdk.IO.csproj
@@ -5,7 +5,7 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
 	<VersionPrefix>1.0.0</VersionPrefix>
-	<VersionSuffix>alpha6.1</VersionSuffix>
+	<VersionSuffix>alpha6.2</VersionSuffix>
 	<AssemblyVersion>$(VersionPrefix)</AssemblyVersion>
 	<FileVersion>$(VersionPrefix)</FileVersion>
 	<NeutralLanguage>en</NeutralLanguage>
diff --git a/src/ServerlessWorkflow.Sdk/Models/Calls/AsyncApiCallDefinition.cs b/src/ServerlessWorkflow.Sdk/Models/Calls/AsyncApiCallDefinition.cs
index 4b021e4..3ca6c18 100644
--- a/src/ServerlessWorkflow.Sdk/Models/Calls/AsyncApiCallDefinition.cs
+++ b/src/ServerlessWorkflow.Sdk/Models/Calls/AsyncApiCallDefinition.cs
@@ -33,14 +33,14 @@ public record AsyncApiCallDefinition
     /// Used only in case the referenced document uses AsyncAPI v2.6.0
     /// </summary>
     [DataMember(Name = "channel", Order = 2), JsonPropertyName("channel"), JsonPropertyOrder(2), JsonInclude, YamlMember(Alias = "channel", Order = 2)]
-    public required virtual string? Channel { get; set; }
+    public virtual string? Channel { get; set; }
 
     /// <summary>
     /// Gets/sets a reference to the AsyncAPI operation to call.<para></para>
     /// Used only in case the referenced document uses AsyncAPI v3.0.0.
     /// </summary>
     [DataMember(Name = "operation", Order = 3), JsonPropertyName("operation"), JsonPropertyOrder(3), JsonInclude, YamlMember(Alias = "operation", Order = 3)]
-    public required virtual string? Operation { get; set; }
+    public virtual string? Operation { get; set; }
 
     /// <summary>
     /// Gets/sets a object used to configure to the server to call the specified AsyncAPI operation on.<para></para>
diff --git a/src/ServerlessWorkflow.Sdk/ServerlessWorkflow.Sdk.csproj b/src/ServerlessWorkflow.Sdk/ServerlessWorkflow.Sdk.csproj
index 826d808..06e4b71 100644
--- a/src/ServerlessWorkflow.Sdk/ServerlessWorkflow.Sdk.csproj
+++ b/src/ServerlessWorkflow.Sdk/ServerlessWorkflow.Sdk.csproj
@@ -5,7 +5,7 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
 	<VersionPrefix>1.0.0</VersionPrefix>
-	<VersionSuffix>alpha6.1</VersionSuffix>
+	<VersionSuffix>alpha6.2</VersionSuffix>
 	<AssemblyVersion>$(VersionPrefix)</AssemblyVersion>
 	<FileVersion>$(VersionPrefix)</FileVersion>
 	<NeutralLanguage>en</NeutralLanguage>