diff --git a/package.json b/package.json
index 0cdfbf4b..8afbee16 100644
--- a/package.json
+++ b/package.json
@@ -59,8 +59,8 @@
   "devDependencies": {
     "benchmark": "1.0.0",
     "bitcore-p2p": "^1.1.0",
-    "chai": "^3.0.0",
-    "mocha": "~1.16.2",
+    "chai": "^3.5.0",
+    "mocha": "^2.4.5",
     "proxyquire": "^1.3.1",
     "rimraf": "^2.4.2",
     "sinon": "^1.15.4"