diff --git a/controllers/api_controller.go b/controllers/api_controller.go
index a6516a232..99c8252cb 100644
--- a/controllers/api_controller.go
+++ b/controllers/api_controller.go
@@ -278,10 +278,11 @@ func (c *ApiController) UpdatePrinter(dataMap map[string]interface{}) (data, err
 	} else {
 		sound = &soundStr
 	}
-	if volumeInt, ok := dataMap[keyVolume].(int); !ok {
+	if volumeInt, ok := dataMap[keyVolume].(string); !ok {
 		volume = nil
 	} else {
-		volume = &volumeInt
+		volumeStr := utils.Str2Int(volumeInt)
+		volume = &volumeStr
 	}
 	appID = utils.Str2Int(dataMap[keyAppID].(string))
 	if err = cms.UpdatePrinter(appID, printNo, name, sim, sound, volume); err != nil {