diff --git a/package.json b/package.json
index 41213a1c0..f21241665 100644
--- a/package.json
+++ b/package.json
@@ -18,10 +18,10 @@
         "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-client": "3.1.2",
         "jsonm": "1.0.6",
         "http-error": "~0.0.5",
-        "less": "^2.4.0",
+        "less": "^3.12.0",
         "mime": "~1.2.9",
         "mkdirp": "~0.3.5",
         "msgpack-js-browser": "~0.1.4",