diff --git a/package.json b/package.json
index 4fad6f9..d8e0e35 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   "dependencies": {
     "cliui": "^2.1.0",
     "debug": "^2.2.0",
-    "graphlib": "^1.0.4",
+    "graphlib": "^2.1.1",
     "lodash.assign": "^3.2.0",
     "lodash.omit": "^3.1.0",
     "nconf": "^0.7.1",