diff --git a/package.json b/package.json
index 65bdab6..d73cdd2 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "url": "https://github.com/bitcoinjs/bitcoinjs-lib.git"
   },
   "devDependencies": {
-    "mocha": "1.8.1",
+    "mocha": "1.18.2",
     "istanbul": "0.1.30",
     "uglify-js": "2.4.13",
     "node-browserify": "https://github.com/substack/node-browserify/tarball/master"