diff --git a/dtmsvr/dtmsvr.go b/dtmsvr/dtmsvr.go
index 26ed2d2..4fec982 100644
--- a/dtmsvr/dtmsvr.go
+++ b/dtmsvr/dtmsvr.go
@@ -20,7 +20,6 @@ import (
 	"google.golang.org/grpc"
 	"gorm.io/gorm/clause"
 
-	_ "github.com/ychensha/dtmdriver-polaris"
 	_ "github.com/yedf/dtmdriver-gozero"
 	_ "github.com/yedf/dtmdriver-protocol1"
 )