diff --git a/metricsmgr/metrics_manager.go b/metricsmgr/metrics_manager.go
index 5387dad..4cf13c1 100644
--- a/metricsmgr/metrics_manager.go
+++ b/metricsmgr/metrics_manager.go
@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/pressly/chainstore"
+	metrics "github.com/rcrowley/go-metrics"
 )
 
 type metricsManager struct {