diff --git a/consul.go b/consul.go
index 8ce44c2..173f166 100644
--- a/consul.go
+++ b/consul.go
@@ -11,7 +11,6 @@ import (
 
 var (
 	DefaultStructTag = "consul"
-	ErrInvalidStruct = errors.New("invalid struct specified")
 	ErrPathNotExist  = errors.New("path is not exist")
 )
 
diff --git a/go.mod b/go.mod
index 71295d2..eab9fb1 100644
--- a/go.mod
+++ b/go.mod
@@ -6,5 +6,5 @@ require (
 	github.com/hashicorp/consul/api v1.8.0
 	github.com/hashicorp/go-hclog v0.15.0
 	github.com/unistack-org/micro-codec-json v0.0.0-20201129180318-74c22103001a
-	github.com/unistack-org/micro/v3 v3.0.2-0.20201207213837-b7b28f6b9add
+	github.com/unistack-org/micro/v3 v3.0.2-0.20201213101738-2dcd30b21c0f
 )
diff --git a/go.sum b/go.sum
index f921942..85b3d94 100644
--- a/go.sum
+++ b/go.sum
@@ -331,8 +331,8 @@ github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200909210629-caec730248b1/go.m
 github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200920135754-1cbd1d2bad83/go.mod h1:HUzMG4Mcy97958VxWTg8zuazZgwQ/aoLZ8wtBVONwRE=
 github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200922103357-4c4fa00a5d94/go.mod h1:aL+8VhSXpx0SuEeXPOWUo5BgS7kyvWYobeXFay90UUM=
 github.com/unistack-org/micro/v3 v3.0.2-0.20201123132107-c9049c384502/go.mod h1:RxbWu3Q2jWpw0er6CwX2BnGdIDfUZg/0c4bMxzAzaH0=
-github.com/unistack-org/micro/v3 v3.0.2-0.20201207213837-b7b28f6b9add h1:WW28bP8gthVh/PmfIzvdOOq0hnsieyVrQjuUEvz/pPQ=
-github.com/unistack-org/micro/v3 v3.0.2-0.20201207213837-b7b28f6b9add/go.mod h1:0DgOy4OdJxQCDER8YSKitZugd2+1bddrRSNfeooTHDc=
+github.com/unistack-org/micro/v3 v3.0.2-0.20201213101738-2dcd30b21c0f h1:VTnea0NAgE0LXQNBpiemP/O6G0Uns6sl5KkyeAKodEU=
+github.com/unistack-org/micro/v3 v3.0.2-0.20201213101738-2dcd30b21c0f/go.mod h1:0DgOy4OdJxQCDER8YSKitZugd2+1bddrRSNfeooTHDc=
 github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/vultr/govultr v0.1.4/go.mod h1:9H008Uxr/C4vFNGLqKx232C206GL0PBHzOP0809bGNA=
 github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=