diff --git a/package.json b/package.json
index d11ff30..aa59cdf 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "semver": "~2.3.0"
   },
   "devDependencies": {
-    "ass": "~0.0.4",
+    "ass": "~0.0.6",
     "should": "~3.0.0",
     "mocha": "~1.14.0"
   },