diff --git a/go.mod b/go.mod
index 1a66c17..82377ac 100644
--- a/go.mod
+++ b/go.mod
@@ -1,13 +1,9 @@
 module go.unistack.org/micro-codec-urlencode/v4
 
-go 1.19
+go 1.20
 
 require (
-	go.unistack.org/micro-proto/v4 v4.0.0
+	go.unistack.org/micro-proto/v4 v4.0.1
 	go.unistack.org/micro/v4 v4.0.1
-)
-
-require (
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	google.golang.org/protobuf v1.32.0
 )
diff --git a/go.sum b/go.sum
index 7e6d860..f9bd60d 100644
--- a/go.sum
+++ b/go.sum
@@ -1,13 +1,8 @@
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
-github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-go.unistack.org/micro-proto/v4 v4.0.0 h1:+TAwKSlx48eLsNO2E2cO0JLE8we1KU2AuWe9Q310FuU=
-go.unistack.org/micro-proto/v4 v4.0.0/go.mod h1:ArmK7o+uFvxSY3dbJhKBBX4Pm1rhWdLEFf3LxBrMtec=
+go.unistack.org/micro-proto/v4 v4.0.1 h1:2RKHgtCOOcAFgKsnngGK5bqM/6MWXOjVCdw03dbuoF8=
+go.unistack.org/micro-proto/v4 v4.0.1/go.mod h1:ArmK7o+uFvxSY3dbJhKBBX4Pm1rhWdLEFf3LxBrMtec=
 go.unistack.org/micro/v4 v4.0.1 h1:xo1IxbVfgh8i0eY0VeYa3cbb13u5n/Mxnp3FOgWD4Jo=
 go.unistack.org/micro/v4 v4.0.1/go.mod h1:p/J5UcSJjfHsWGT31uKoghQ5rUQZzQJBAFy+Z4+ZVMs=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
-google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
+google.golang.org/protobuf v1.32.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
diff --git a/urlencode.go b/urlencode.go
index 22a2ffc..154ab1b 100644
--- a/urlencode.go
+++ b/urlencode.go
@@ -1,12 +1,14 @@
 // Package urlencode provides a urlencode codec
-package urlencode // import "go.unistack.org/micro-codec-urlencode/v4"
+package urlencode
 
 import (
+	"encoding/json"
 	"io"
 
 	pb "go.unistack.org/micro-proto/v4/codec"
 	"go.unistack.org/micro/v4/codec"
 	rutil "go.unistack.org/micro/v4/util/reflect"
+	"google.golang.org/protobuf/types/known/structpb"
 )
 
 type urlencodeCodec struct {
@@ -75,6 +77,16 @@ func (c *urlencodeCodec) Unmarshal(b []byte, v interface{}, opts ...codec.Option
 		return err
 	}
 
+	switch t := v.(type) {
+	case *structpb.Value:
+
+		buf, err := json.Marshal(mp)
+		if err == nil {
+			err = t.UnmarshalJSON(buf)
+		}
+		return err
+	}
+
 	return rutil.Merge(v, rutil.FlattenMap(mp), rutil.Tags([]string{"protobuf", "json", "xml", "yaml"}), rutil.SliceAppend(true))
 }