diff --git a/package.json b/package.json
index 0a231e3..91974e9 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "imgflo-url": "0.6.0"
   },
   "devDependencies": {
-    "chai": "3.3.0",
+    "chai": "3.4.0",
     "coffee-script": "1.10.0",
     "mocha": "2.5.3"
   },