diff --git a/lib/web/imageRouter/minio.js b/lib/web/imageRouter/minio.js
index fe43f76f..d0dd5eef 100644
--- a/lib/web/imageRouter/minio.js
+++ b/lib/web/imageRouter/minio.js
@@ -32,16 +32,16 @@ exports.uploadImage = function (imagePath, callback) {
       return
     }
 
-    let key = path.join('uploads', path.basename(imagePath))
-    let protocol = config.minio.secure ? 'https' : 'http'
+    const key = path.join('uploads', path.basename(imagePath))
+    const protocol = config.minio.secure ? 'https' : 'http'
 
     minioClient.putObject(config.s3bucket, key, buffer, buffer.size, getImageMimeType(imagePath), function (err, data) {
       if (err) {
         callback(new Error(err), null)
         return
       }
-      let hidePort = [80, 443].includes(config.minio.port)
-      let urlPort = hidePort ? '' : `:${config.minio.port}`
+      const hidePort = [80, 443].includes(config.minio.port)
+      const urlPort = hidePort ? '' : `:${config.minio.port}`
       callback(null, `${protocol}://${config.minio.endPoint}${urlPort}/${config.s3bucket}/${key}`)
     })
   })