diff --git a/package.json b/package.json
index 8bb5344..b48b767 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "routable": "~0.0.5"
   },
   "devDependencies": {
-    "assume": "~1.5.0",
+    "assume": "~1.5.1",
     "binary-pack": "~1.0.2",
     "istanbul": "~0.4.5",
     "mocha": "~3.2.0",