diff --git a/config.go b/config.go
index e33e554..e02aa66 100644
--- a/config.go
+++ b/config.go
@@ -38,7 +38,7 @@ type CameraConfig struct {
 	IP          string `yaml:"ip" json:"ip"`
 	Username    string `yaml:"username" json:"username"`
 	Password    string `yaml:"password" json:"password"`
-	ONVIFPort   int    `yaml:"onvif_port" json:"onvif_port"`
+	ONVIFPort   int    `yaml:"onvif_port" json:"onvif_port,string"`
 	RTSPMain    string `yaml:"rtsp_main" json:"rtsp_main"`
 	RTSPSub     string `yaml:"rtsp_sub" json:"rtsp_sub"`
 	Description string `yaml:"description" json:"description"`