diff --git a/package.json b/package.json
index 6649677..28bf9e5 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   },
   "homepage": "https://github.com/unshiftio/eventstub",
   "devDependencies": {
-    "assume": "~2.0.0",
+    "assume": "~2.2.0",
     "istanbul": "~0.4.5",
     "mocha": "~3.5.0",
     "pre-commit": "~1.2.0"