diff --git a/cmd/sing-box/cmd_run.go b/cmd/sing-box/cmd_run.go
index d76d3b9c..ba729472 100644
--- a/cmd/sing-box/cmd_run.go
+++ b/cmd/sing-box/cmd_run.go
@@ -17,6 +17,7 @@ import (
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/json"
 	"github.com/sagernet/sing/common/json/badjson"
 
 	"github.com/spf13/cobra"
@@ -107,13 +108,18 @@ func readConfigAndMerge() (option.Options, error) {
 	if len(optionsList) == 1 {
 		return optionsList[0].options, nil
 	}
-	var mergedOptions option.Options
+	var mergedMessage json.RawMessage
 	for _, options := range optionsList {
-		mergedOptions, err = badjson.Merge(options.options, mergedOptions)
+		mergedMessage, err = badjson.MergeJSON(options.options.RawMessage, mergedMessage)
 		if err != nil {
 			return option.Options{}, E.Cause(err, "merge config at ", options.path)
 		}
 	}
+	var mergedOptions option.Options
+	err = mergedOptions.UnmarshalJSON(mergedMessage)
+	if err != nil {
+		return option.Options{}, E.Cause(err, "unmarshal merged config")
+	}
 	return mergedOptions, nil
 }
 
diff --git a/go.mod b/go.mod
index 554a4ccf..b9a18564 100644
--- a/go.mod
+++ b/go.mod
@@ -26,7 +26,7 @@ require (
 	github.com/sagernet/gvisor v0.0.0-20231209105102-8d27a30e436e
 	github.com/sagernet/quic-go v0.40.0
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691
-	github.com/sagernet/sing v0.2.19-0.20231209022445-766839c00099
+	github.com/sagernet/sing v0.2.19-0.20231211084415-35e7014b0898
 	github.com/sagernet/sing-dns v0.1.11
 	github.com/sagernet/sing-mux v0.1.6-0.20231207143704-9f6c20fb5266
 	github.com/sagernet/sing-quic v0.1.6-0.20231207143711-eb3cbf9ed054
diff --git a/go.sum b/go.sum
index 0896f697..03429bb8 100644
--- a/go.sum
+++ b/go.sum
@@ -109,8 +109,8 @@ github.com/sagernet/quic-go v0.40.0/go.mod h1:VqtdhlbkeeG5Okhb3eDMb/9o0EoglReHun
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691 h1:5Th31OC6yj8byLGkEnIYp6grlXfo1QYUfiYFGjewIdc=
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691/go.mod h1:B8lp4WkQ1PwNnrVMM6KyuFR20pU8jYBD+A4EhJovEXU=
 github.com/sagernet/sing v0.2.18/go.mod h1:OL6k2F0vHmEzXz2KW19qQzu172FDgSbUSODylighuVo=
-github.com/sagernet/sing v0.2.19-0.20231209022445-766839c00099 h1:q/efB3NAhVolSoBe0oDc7eZ7/72+OZITWVwn0o92Hp0=
-github.com/sagernet/sing v0.2.19-0.20231209022445-766839c00099/go.mod h1:Ce5LNojQOgOiWhiD8pPD6E9H7e2KgtOe3Zxx4Ou5u80=
+github.com/sagernet/sing v0.2.19-0.20231211084415-35e7014b0898 h1:UsIwOvI9JAsUeRBFv6joJUW2CvH7yTzwr86OF2+hBCg=
+github.com/sagernet/sing v0.2.19-0.20231211084415-35e7014b0898/go.mod h1:Ce5LNojQOgOiWhiD8pPD6E9H7e2KgtOe3Zxx4Ou5u80=
 github.com/sagernet/sing-dns v0.1.11 h1:PPrMCVVrAeR3f5X23I+cmvacXJ+kzuyAsBiWyUKhGSE=
 github.com/sagernet/sing-dns v0.1.11/go.mod h1:zJ/YjnYB61SYE+ubMcMqVdpaSvsyQ2iShQGO3vuLvvE=
 github.com/sagernet/sing-mux v0.1.6-0.20231207143704-9f6c20fb5266 h1:QqwwUyEfmOuoGVTZ2cYvUJEeSWlzunvQLRmv+9B41uk=
diff --git a/option/config.go b/option/config.go
index 3cec5520..724bfce6 100644
--- a/option/config.go
+++ b/option/config.go
@@ -9,6 +9,7 @@ import (
 )
 
 type _Options struct {
+	RawMessage   json.RawMessage      `json:"-"`
 	Schema       string               `json:"$schema,omitempty"`
 	Log          *LogOptions          `json:"log,omitempty"`
 	DNS          *DNSOptions          `json:"dns,omitempty"`
@@ -26,6 +27,7 @@ func (o *Options) UnmarshalJSON(content []byte) error {
 	decoder.DisallowUnknownFields()
 	err := decoder.Decode((*_Options)(o))
 	if err == nil {
+		o.RawMessage = content
 		return nil
 	}
 	if syntaxError, isSyntaxError := err.(*json.SyntaxError); isSyntaxError {