diff --git a/internal/config/models.go b/internal/config/models.go
index ebb2b95..55355cb 100644
--- a/internal/config/models.go
+++ b/internal/config/models.go
@@ -30,8 +30,9 @@ type (
 )
 
 type SettingsConf struct {
-	Basic    BasicConf    `json:"basic" yaml:"basic"`
-	Guardian GuardianConf `json:"guardian" yaml:"guardian"`
-	Log      LogConf      `json:"log" yaml:"log"`
-	DDNS     DdnsConf     `json:"ddns" yaml:"ddns"`
+	Basic        BasicConf              `json:"basic" yaml:"basic"`
+	Guardian     GuardianConf           `json:"guardian" yaml:"guardian"`
+	Log          LogConf                `json:"log" yaml:"log"`
+	DDNS         DdnsConf               `json:"ddns" yaml:"ddns"`
+	CustomHeader map[string]interface{} `json:"custom_header" yaml:"custom_header"`
 }
diff --git a/internal/config/reader.go b/internal/config/reader.go
index f378b5e..577c5ba 100644
--- a/internal/config/reader.go
+++ b/internal/config/reader.go
@@ -1,6 +1,7 @@
 package config
 
 import (
+	"bytes"
 	"encoding/json"
 	log "github.com/sirupsen/logrus"
 	"gopkg.in/yaml.v3"
@@ -31,7 +32,9 @@ func (Json) Marshal(v any) ([]byte, error) {
 	return json.MarshalIndent(v, "", " ")
 }
 func (Json) Unmarshal(data []byte, v any) error {
-	return json.Unmarshal(data, v)
+	jsonDecoder := json.NewDecoder(bytes.NewReader(data))
+	jsonDecoder.UseNumber()
+	return jsonDecoder.Decode(v)
 }
 
 type Yaml struct {