diff --git a/CHANGES.md b/CHANGES.md
index 29be98f..2a986a2 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,2 +1 @@
-1.5.0
- * Moved the Seq sink from its [original location](https://github.com/serilog/serilog)
+Please see: https://github.com/serilog/serilog-sinks-seq/releases for changelog.
diff --git a/sample/Sample/Program.cs b/sample/Sample/Program.cs
index d350a91..c277d31 100644
--- a/sample/Sample/Program.cs
+++ b/sample/Sample/Program.cs
@@ -17,7 +17,7 @@ public static void Main(string[] args)
                 .MinimumLevel.ControlledBy(levelSwitch)
                 .WriteTo.LiterateConsole()
                 .WriteTo.Seq("http://localhost:5341",
-                             apiKey: "yeEZyL3SMcxEKUijBjN",
+                             apiKey: "o6nYf3WWnzF43Uu5PZWJ",
                              controlLevelSwitch: levelSwitch)
                 .CreateLogger();
 
@@ -25,7 +25,7 @@ public static void Main(string[] args)
 
             foreach (var i in Enumerable.Range(0, 1000))
             {
-                Log.Information("Running loop {Counter}", i);
+                Log.Information("Running loop {Counter}, switch is at {Level}", i, levelSwitch.MinimumLevel);
 
                 Thread.Sleep(1000);
                 Log.Debug("Loop iteration done");
diff --git a/src/Serilog.Sinks.Seq/Serilog.Sinks.Seq.csproj b/src/Serilog.Sinks.Seq/Serilog.Sinks.Seq.csproj
index 7265531..3b6cd54 100644
--- a/src/Serilog.Sinks.Seq/Serilog.Sinks.Seq.csproj
+++ b/src/Serilog.Sinks.Seq/Serilog.Sinks.Seq.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <Description>Serilog sink that writes to the Seq log server over HTTP/HTTPS.</Description>
-    <VersionPrefix>3.3.2</VersionPrefix>
+    <VersionPrefix>3.3.3</VersionPrefix>
     <Authors>Serilog Contributors</Authors>
     <Copyright>Copyright © Serilog Contributors 2013-2017</Copyright>
     <TargetFrameworks>netstandard1.1;netstandard1.3;net45;net46</TargetFrameworks>
diff --git a/src/Serilog.Sinks.Seq/Sinks/Seq/SeqSink.cs b/src/Serilog.Sinks.Seq/Sinks/Seq/SeqSink.cs
index 4f08be6..5288b40 100644
--- a/src/Serilog.Sinks.Seq/Sinks/Seq/SeqSink.cs
+++ b/src/Serilog.Sinks.Seq/Sinks/Seq/SeqSink.cs
@@ -76,12 +76,12 @@ protected override void Dispose(bool disposing)
 
         // The sink must emit at least one event on startup, and the server be
         // configured to set a specific level, before background level checks will be performed.
-        protected override void OnEmptyBatch()
+        protected override async Task OnEmptyBatchAsync()
         {
             if (_controlledSwitch.IsActive &&
                 _nextRequiredLevelCheckUtc < DateTime.UtcNow)
             {
-                EmitBatch(Enumerable.Empty<LogEvent>());
+                await EmitBatchAsync(Enumerable.Empty<LogEvent>());
             }
         }