diff --git a/package.json b/package.json
index 84ad185..8d55387 100644
--- a/package.json
+++ b/package.json
@@ -17,9 +17,9 @@
   "license": "MIT",
   "dependencies": {},
   "devDependencies": {
-    "istanbul": "^0.3.5",
+    "istanbul": "^0.4.5",
     "make-lint": "^1.0.1",
-    "mocha": "^2.0.1"
+    "mocha": "^3.1.2"
   },
   "files": [
     "LICENSE",