diff --git a/consul.go b/consul.go
index 1da5c1d..dae8ddc 100644
--- a/consul.go
+++ b/consul.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 
 	"github.com/hashicorp/consul/api"
+	"github.com/imdario/mergo"
 	"github.com/unistack-org/micro/v3/config"
 )
 
@@ -95,9 +96,18 @@ func (c *consulConfig) Load(ctx context.Context) error {
 	}
 
 	if err == nil && pair != nil {
-		if err = c.opts.Codec.Unmarshal(pair.Value, c.opts.Struct); err != nil && !c.opts.AllowFail {
+		dst, err := config.Zero(c.opts.Struct)
+		if err == nil {
+			err = c.opts.Codec.Unmarshal(pair.Value, c.opts.Struct)
+			if err == nil {
+				err = mergo.Merge(c.opts.Struct, dst, mergo.WithOverride, mergo.WithTypeCheck, mergo.WithAppendSlice)
+			}
+		}
+
+		if err != nil && !c.opts.AllowFail {
 			return err
 		}
+
 	}
 
 	for _, fn := range c.opts.AfterLoad {
diff --git a/go.mod b/go.mod
index 14ebf03..daa2ee4 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.15
 require (
 	github.com/hashicorp/consul/api v1.8.0
 	github.com/hashicorp/go-hclog v0.15.0
+	github.com/imdario/mergo v0.3.11
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/unistack-org/micro/v3 v3.0.2-0.20201219202205-150e8ad698bb
+	github.com/unistack-org/micro/v3 v3.0.2-0.20201219211529-b50855855b58
 )
diff --git a/go.sum b/go.sum
index c327eaa..25d7c78 100644
--- a/go.sum
+++ b/go.sum
@@ -178,6 +178,8 @@ github.com/hashicorp/serf v0.9.5 h1:EBWvyu9tcRszt3Bxp3KNssBMP1KuHWyO51lz9+786iM=
 github.com/hashicorp/serf v0.9.5/go.mod h1:UWDWwZeL5cuWDJdl0C6wrvrUwEqtQ4ZKBKKENpqIUyk=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/iij/doapi v0.0.0-20190504054126-0bbf12d6d7df/go.mod h1:QMZY7/J/KSQEhKWFeDesPjMj+wCHReeknARU3wqlyN4=
+github.com/imdario/mergo v0.3.11 h1:3tnifQM4i+fbajXKBHXWEH+KvNHqojZ778UH75j3bGA=
+github.com/imdario/mergo v0.3.11/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/json-iterator/go v1.1.5/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
@@ -310,6 +312,8 @@ github.com/unistack-org/micro/v3 v3.0.2-0.20201213102644-92aec349c3d4 h1:SmwEx/E
 github.com/unistack-org/micro/v3 v3.0.2-0.20201213102644-92aec349c3d4/go.mod h1:0DgOy4OdJxQCDER8YSKitZugd2+1bddrRSNfeooTHDc=
 github.com/unistack-org/micro/v3 v3.0.2-0.20201219202205-150e8ad698bb h1:cJGF8j30idReDyjRCvEJN5waWCh/AKuiKEqLA8OLMlY=
 github.com/unistack-org/micro/v3 v3.0.2-0.20201219202205-150e8ad698bb/go.mod h1:0DgOy4OdJxQCDER8YSKitZugd2+1bddrRSNfeooTHDc=
+github.com/unistack-org/micro/v3 v3.0.2-0.20201219211529-b50855855b58 h1:cxBL1qxHsugjajAf/N14Lmk8V1KL1LH9rMGnYEokrpI=
+github.com/unistack-org/micro/v3 v3.0.2-0.20201219211529-b50855855b58/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=