diff --git a/CHANGELOG.md b/CHANGELOG.md
index 78c2205..83165d3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+## [1.0.9] - 2024-11-17
+
+### Changed
+- Fix a bug in 1.0.8 by downgrading the Stateless package.
+
 ## [1.0.8] - 2024-11-17
 
 ### Changed
diff --git a/TelnetNegotiationCore/Interpreters/TelnetStandardInterpreter.cs b/TelnetNegotiationCore/Interpreters/TelnetStandardInterpreter.cs
index cddcabe..390a5e8 100644
--- a/TelnetNegotiationCore/Interpreters/TelnetStandardInterpreter.cs
+++ b/TelnetNegotiationCore/Interpreters/TelnetStandardInterpreter.cs
@@ -160,7 +160,7 @@ private StateMachine<State, Trigger> SetupStandardProtocol(StateMachine<State, T
 		// We've gotten a newline. We interpret this as time to act and send a signal back.
 		tsm.Configure(State.Act)
 			.SubstateOf(State.Accepting)
-			.OnEntry(WriteToOutput);
+			.OnEntryAsync(async () => await WriteToOutput());
 
 		// SubNegotiation
 		tsm.Configure(State.Accepting)
@@ -218,12 +218,12 @@ private async ValueTask WriteToBufferAndAdvanceAsync(OneOf<byte, Trigger> b)
 	/// <summary>
 	/// Write it to output - this should become an Event.
 	/// </summary>
-	private void WriteToOutput()
+	private async ValueTask WriteToOutput()
 	{
 		var cp = new byte[_bufferPosition];
 		_buffer.AsSpan()[.._bufferPosition].CopyTo(cp);
 		_bufferPosition = 0;
-		CallbackOnSubmitAsync.Invoke(cp, CurrentEncoding, this);
+		await CallbackOnSubmitAsync.Invoke(cp, CurrentEncoding, this);
 	}
 
 	/// <summary>
diff --git a/TelnetNegotiationCore/TelnetNegotiationCore.csproj b/TelnetNegotiationCore/TelnetNegotiationCore.csproj
index b153cea..4939131 100644
--- a/TelnetNegotiationCore/TelnetNegotiationCore.csproj
+++ b/TelnetNegotiationCore/TelnetNegotiationCore.csproj
@@ -50,7 +50,7 @@
 		</Content>
 		<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.0" />
 		<PackageReference Include="OneOf" Version="3.0.271" />
-		<PackageReference Include="stateless" Version="5.16.0" />
+		<PackageReference Include="stateless" Version="5.15.0" />
 		<PackageReference Include="System.Collections.Immutable" Version="9.0.0" />
 		<PackageReference Include="System.Runtime" Version="4.3.1" />
 	</ItemGroup>