diff --git a/package.json b/package.json
index 4ce4a21..2ce68d2 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "compression": "^1.0.3",
     "debug": "^2.1.3",
     "duplex": "^1.0.0",
-    "engine.io": "^1.5.1",
+    "engine.io": "^3.4.0",
     "errorhandler": "^1.1.1",
     "loopback": "^2.8.0",
     "loopback-boot": "^2.4.0",