diff --git a/package.json b/package.json
index ee35a55..9f1dce3 100644
--- a/package.json
+++ b/package.json
@@ -4,11 +4,11 @@
   "description": "dates for humans",
   "main": "index.js",
   "dependencies": {
-    "debug": "~0.7.2"
+    "debug": "~3.1.0"
   },
   "devDependencies": {
     "better-assert": "~1.0.0",
-    "mocha": "~1.9.0"
+    "mocha": "~4.0.1"
   },
   "scripts": {
     "test": "make test"