diff --git a/go.mod b/go.mod
index e602405d1..f9104c15a 100644
--- a/go.mod
+++ b/go.mod
@@ -34,6 +34,7 @@ require (
 	github.com/grandcat/zeroconf v1.0.0
 	github.com/gregdel/pushover v1.1.0
 	github.com/grid-x/modbus v0.0.0-20210714071042-7af2b65ec03b
+	github.com/grid-x/serial v0.0.0-20211107191517-583c7356b3aa // indirect
 	github.com/hashicorp/go-version v1.3.0
 	github.com/imdario/mergo v0.3.12
 	github.com/influxdata/influxdb-client-go/v2 v2.4.0
diff --git a/go.sum b/go.sum
index 693c326e4..e7050372d 100644
--- a/go.sum
+++ b/go.sum
@@ -325,8 +325,9 @@ github.com/gregdel/pushover v1.1.0 h1:dwHyvrcpZCOS9V1fAnKPaGRRI5OC55cVaKhMybqNsK
 github.com/gregdel/pushover v1.1.0/go.mod h1:EcaO66Nn1StkpEm1iKtBTV3d2A16SoMsVER1PthX7to=
 github.com/grid-x/modbus v0.0.0-20210714071042-7af2b65ec03b h1:ur6X0rPWCe3R5AC5X7qIySVhP/34pM3A1uQVJ0GEdKw=
 github.com/grid-x/modbus v0.0.0-20210714071042-7af2b65ec03b/go.mod h1:YaK0rKJenZ74vZFcSSLlAQqtG74PMI68eDjpDCDDmTw=
-github.com/grid-x/serial v0.0.0-20191104121038-e24bc9bf6f08 h1:syBxnRYnSPUDdkdo5U4sy2roxBPQDjNiw4od7xlsABQ=
 github.com/grid-x/serial v0.0.0-20191104121038-e24bc9bf6f08/go.mod h1:kdOd86/VGFWRrtkNwf1MPk0u1gIjc4Y7R2j7nhwc7Rk=
+github.com/grid-x/serial v0.0.0-20211107191517-583c7356b3aa h1:Rsn6ARgNkXrsXJIzhkE4vQr5Gbx2LvtEMv4BJOK4LyU=
+github.com/grid-x/serial v0.0.0-20211107191517-583c7356b3aa/go.mod h1:kdOd86/VGFWRrtkNwf1MPk0u1gIjc4Y7R2j7nhwc7Rk=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=