diff --git a/chain/vm/execution.go b/chain/vm/execution.go
index 0edb13884..1642dc2f8 100644
--- a/chain/vm/execution.go
+++ b/chain/vm/execution.go
@@ -7,11 +7,10 @@ import (
 	"strconv"
 	"sync"
 
+	"github.com/ipfs/go-cid"
 	"go.opencensus.io/stats"
 	"go.opencensus.io/tag"
 
-	"github.com/ipfs/go-cid"
-
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/metrics"
 )