diff --git a/internal/exporter/exporter.go b/internal/exporter/exporter.go
index 5ede92b3..5956a99f 100644
--- a/internal/exporter/exporter.go
+++ b/internal/exporter/exporter.go
@@ -26,6 +26,7 @@ import (
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/codes"
 	sdktrace "go.opentelemetry.io/otel/sdk/trace"
+	"strings"
 )
 
 type exporter struct {
@@ -33,7 +34,7 @@ type exporter struct {
 
 func exportSpan(_ context.Context, s sdktrace.ReadOnlySpan) {
 	evt := reporter.CreateEntryEvent(s.SpanContext(), s.StartTime(), s.Parent())
-	layer := fmt.Sprintf("%s:%s", s.SpanKind().String(), s.Name())
+	layer := fmt.Sprintf("%s:%s", strings.ToUpper(s.SpanKind().String()), s.Name())
 	evt.SetLayer(layer)
 	evt.AddKVs([]attribute.KeyValue{
 		attribute.String("sw.span_name", s.Name()),
diff --git a/internal/exporter/exporter_test.go b/internal/exporter/exporter_test.go
index 9e2a873d..e4093da1 100644
--- a/internal/exporter/exporter_test.go
+++ b/internal/exporter/exporter_test.go
@@ -80,7 +80,7 @@ func TestExportSpan(t *testing.T) {
 			"Hostname":           host.Hostname(),
 			"Label":              "entry",
 			"Language":           "Go",
-			"Layer":              "internal:foo",
+			"Layer":              "INTERNAL:foo",
 			"PID":                host.PID(),
 			"Timestamp_u":        start.UnixMicro(),
 			"TransactionName":    "foo",
@@ -145,7 +145,7 @@ func TestExportSpan(t *testing.T) {
 			"sw.parent_span_id": spanId,
 			"Hostname":          host.Hostname(),
 			"Label":             "exit",
-			"Layer":             "internal:foo",
+			"Layer":             "INTERNAL:foo",
 			"PID":               host.PID(),
 			"Timestamp_u":       end.UnixMicro(),
 			"X-Trace":           exit.GetXTrace(),