diff --git a/client/tsconfig.json b/client/tsconfig.json
index e23d050..47bf9ef 100644
--- a/client/tsconfig.json
+++ b/client/tsconfig.json
@@ -3,7 +3,7 @@
     "strict": true,
     "strictNullChecks": false,
     "module": "ES6",
-    "target": "ES6",
+    "target": "ES5",
     "jsx": "react",
     "lib": ["DOM"],
     "baseUrl": "./src",
diff --git a/client/webpack.common.js b/client/webpack.common.js
index f544e3d..759dc64 100644
--- a/client/webpack.common.js
+++ b/client/webpack.common.js
@@ -15,7 +15,7 @@ module.exports = {
         loader: 'esbuild-loader',
         options: {
           loader: 'tsx',
-          target: 'es2017'
+          target: 'es2015'
         }
       },
     ],