diff --git a/src/Serilog.Sinks.Trace/Sinks/Trace/TraceSink.cs b/src/Serilog.Sinks.Trace/Sinks/Trace/TraceSink.cs
index 8dfa960..2f1c763 100644
--- a/src/Serilog.Sinks.Trace/Sinks/Trace/TraceSink.cs
+++ b/src/Serilog.Sinks.Trace/Sinks/Trace/TraceSink.cs
@@ -20,7 +20,7 @@
 
 namespace Serilog.Sinks.Trace;
 
-class TraceSink : ILogEventSink
+sealed class TraceSink : ILogEventSink
 {
     readonly ITextFormatter _textFormatter;