diff --git a/node-xmpp-client/tsconfig.json b/node-xmpp-client/tsconfig.json
index fface20c51..03d7dfa4db 100644
--- a/node-xmpp-client/tsconfig.json
+++ b/node-xmpp-client/tsconfig.json
@@ -1,7 +1,9 @@
 {
   "compilerOptions": {
     "module": "commonjs",
-    "target": "es5",
+    "lib": [
+      "es6"
+    ],
     "noImplicitAny": true,
     "noImplicitThis": true,
     "strictNullChecks": true,