diff --git a/sourcemap-reader/servers/sourcemaps-handler.js b/sourcemap-reader/servers/sourcemaps-handler.js
index 19ecf5d0b..25185ffa3 100644
--- a/sourcemap-reader/servers/sourcemaps-handler.js
+++ b/sourcemap-reader/servers/sourcemaps-handler.js
@@ -4,11 +4,11 @@ const sourceMap = require('source-map');
 const AWS = require('aws-sdk');
 const URL = require('url');
 const wasm = fs.readFileSync('/mappings.wasm');
+sourceMap.SourceMapConsumer.initialize({
+    "lib/mappings.wasm": wasm
+});
 
 module.exports.sourcemapReader = async event => {
-    sourceMap.SourceMapConsumer.initialize({
-        "lib/mappings.wasm": wasm
-    });
     let s3;
     if (event.S3_HOST) {
         s3 = new AWS.S3({
diff --git a/sourcemap-reader/servers/sourcemaps-server.js b/sourcemap-reader/servers/sourcemaps-server.js
index a1dd501a0..ced43125c 100644
--- a/sourcemap-reader/servers/sourcemaps-server.js
+++ b/sourcemap-reader/servers/sourcemaps-server.js
@@ -1,6 +1,6 @@
-var express = require('express');
-var handler = require('./sourcemaps-handler');
-var router = express.Router();
+const express = require('express');
+const handler = require('./sourcemaps-handler');
+const router = express.Router();
 
 router.post('/', (req, res) => {
     let data = '';