diff --git a/module/cloud.js b/module/cloud.js
index 2f80fc8..bb5f157 100644
--- a/module/cloud.js
+++ b/module/cloud.js
@@ -69,11 +69,7 @@ module.exports = async (query, request) => {
     }
   } else {
     if (!fileMd5) {
-      fileMd5 = await new Promise((resolve) => {
-        setImmediate(() => {
-          resolve(crypto.createHash('md5').update(query.songFile.data).digest('hex'))
-        })
-      })
+      fileMd5 = crypto.createHash('md5').update(query.songFile.data).digest('hex')
     }
     fileSize = query.songFile.data.byteLength
   }
diff --git a/server.js b/server.js
index a02d4d8..1bc6e86 100644
--- a/server.js
+++ b/server.js
@@ -178,12 +178,15 @@ async function consturctServer(moduleDefs) {
   /**
    * Body Parser and File Upload
    */
-  app.use(express.json({ limit: '500mb' }))
-  app.use(express.urlencoded({ extended: false, limit: '500mb' }))
+  const MAX_UPLOAD_SIZE_MB = 500
+  const MAX_UPLOAD_SIZE_BYTES = MAX_UPLOAD_SIZE_MB * 1024 * 1024
+
+  app.use(express.json({ limit: `${MAX_UPLOAD_SIZE_MB}mb` }))
+  app.use(express.urlencoded({ extended: false, limit: `${MAX_UPLOAD_SIZE_MB}mb` }))
 
   app.use(fileUpload({
     limits: {
-      fileSize: 500 * 1024 * 1024
+      fileSize: MAX_UPLOAD_SIZE_BYTES
     },
     useTempFiles: true,
     tempFileDir: require('os').tmpdir(),