diff --git a/package.json b/package.json
index 38f1c3e..d839dce 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "test": "./node_modules/.bin/nodeunit test"
   },
   "dependencies": {
-    "flags": "0.1.3",
+    "flags": "4.0.0",
     "kew": "git+https://github.com/Medium/kew#b8aaf9f",
     "metrics": "0.1.11",
     "progress": "2.0.0"