diff --git a/node/modules/tracer/tracer.go b/node/modules/tracer/tracer.go
index ad5f5c6b7..7d8d9e2c4 100644
--- a/node/modules/tracer/tracer.go
+++ b/node/modules/tracer/tracer.go
@@ -29,7 +29,7 @@ const (
 
 type LotusTraceEvent struct {
 	Type       pubsub_pb.TraceEvent_Type `json:"type,omitempty"`
-	PeerID     []byte                    `json:"peerID,omitempty"`
+	PeerID     string                    `json:"peerID,omitempty"`
 	Timestamp  *int64                    `json:"timestamp,omitempty"`
 	PeerScores *TraceEvent_PeerScores    `json:"peerScores,omitempty"`
 }
@@ -49,7 +49,7 @@ func (lt *lotusTracer) PeerScores(scores map[peer.ID]*pubsub.PeerScoreSnapshot)
 	now := time.Now().UnixNano()
 	evt := &LotusTraceEvent{
 		Type:      *TraceEvent_PEER_SCORES.Enum(),
-		PeerID:    []byte(lt.pid),
+		PeerID:    string(lt.pid),
 		Timestamp: &now,
 		PeerScores: &TraceEvent_PeerScores{
 			Scores: scores,