diff --git a/package.json b/package.json
index 41213a1c0..95a7e0412 100644
--- a/package.json
+++ b/package.json
@@ -14,11 +14,11 @@
         "async": "^0.9.0",
         "base64id": "~0.1.0",
         "connect": "~2.12.0",
-        "debug": "~0.7.4",
+        "debug": "~3.1.0",
         "ejs": "~1.0.0",
         "emmet": "git+https://github.com/cloud9ide/emmet-core.git#2ff6dc06ad",
-        "engine.io": "1.6.9",
-        "engine.io-client": "1.6.9",
+        "engine.io": "3.1.5",
+        "engine.io-client": "3.1.5",
         "jsonm": "1.0.6",
         "http-error": "~0.0.5",
         "less": "^2.4.0",