diff --git a/node/modules/tracer/tracer.go b/node/modules/tracer/tracer.go
index 0d0a156d9..72f068d12 100644
--- a/node/modules/tracer/tracer.go
+++ b/node/modules/tracer/tracer.go
@@ -31,7 +31,7 @@ const (
 
 type LotusTraceEvent struct {
 	Type       pubsub_pb.TraceEvent_Type `json:"type,omitempty"`
-	PeerID     string                    `json:"peerID,omitempty"`
+	PeerID     []byte                    `json:"peerID,omitempty"`
 	Timestamp  *int64                    `json:"timestamp,omitempty"`
 	PeerScore  TraceEventPeerScore       `json:"peerScore,omitempty"`
 	SourceAuth string                    `json:"sourceAuth,omitempty"`
@@ -46,7 +46,7 @@ type TopicScore struct {
 }
 
 type TraceEventPeerScore struct {
-	PeerID             string       `json:"peerID"`
+	PeerID             []byte       `json:"peerID"`
 	Score              float64      `json:"score"`
 	AppSpecificScore   float64      `json:"appSpecificScore"`
 	IPColocationFactor float64      `json:"ipColocationFactor"`
@@ -77,11 +77,11 @@ func (lt *lotusTracer) PeerScores(scores map[peer.ID]*pubsub.PeerScoreSnapshot)
 
 		evt := &LotusTraceEvent{
 			Type:       *TraceEventPeerScores.Enum(),
-			PeerID:     lt.pid.Pretty(),
+			PeerID:     []byte(lt.pid),
 			Timestamp:  &now,
 			SourceAuth: lt.sa,
 			PeerScore: TraceEventPeerScore{
-				PeerID:             pid.Pretty(),
+				PeerID:             []byte(pid),
 				Score:              score.Score,
 				AppSpecificScore:   score.AppSpecificScore,
 				IPColocationFactor: score.IPColocationFactor,
@@ -104,7 +104,6 @@ func (lt *lotusTracer) TraceLotusEvent(evt *LotusTraceEvent) {
 			log.Errorf("error while transporting peer scores: %s", err)
 		}
 	}
-
 }
 
 func (lt *lotusTracer) Trace(evt *pubsub_pb.TraceEvent) {
diff --git a/node/modules/tracer/tracer_test.go b/node/modules/tracer/tracer_test.go
index 7ade67861..f0d7b2c0b 100644
--- a/node/modules/tracer/tracer_test.go
+++ b/node/modules/tracer/tracer_test.go
@@ -30,16 +30,15 @@ func (ttt *testTracerTransport) Transport(evt TracerTransportEvent) error {
 }
 
 func TestTracer_PeerScores(t *testing.T) {
-
 	testTransport := NewTestTraceTransport(t, func(t *testing.T, evt TracerTransportEvent) {
-		require.Equal(t, peerIDA.Pretty(), evt.lotusTraceEvent.PeerID)
+		require.Equal(t, []byte(peerIDA), evt.lotusTraceEvent.PeerID)
 		require.Equal(t, "source-auth-token-test", evt.lotusTraceEvent.SourceAuth)
 		require.Equal(t, float64(32), evt.lotusTraceEvent.PeerScore.Score)
 
 		n := time.Now().UnixNano()
 		require.LessOrEqual(t, *evt.lotusTraceEvent.Timestamp, n)
 
-		require.Equal(t, peerIDA.Pretty(), evt.lotusTraceEvent.PeerScore.PeerID)
+		require.Equal(t, []byte(peerIDA), evt.lotusTraceEvent.PeerScore.PeerID)
 		require.Equal(t, 1, len(evt.lotusTraceEvent.PeerScore.Topics))
 
 		topic := evt.lotusTraceEvent.PeerScore.Topics[0]
@@ -85,7 +84,6 @@ func TestTracer_PubSubTrace(t *testing.T) {
 		PeerID:    []byte(peerIDA),
 		Timestamp: &n,
 	})
-
 }
 
 func TestTracer_MultipleTransports(t *testing.T) {