diff --git a/package.json b/package.json
index 8f725e3..3642f51 100644
--- a/package.json
+++ b/package.json
@@ -33,10 +33,12 @@
     "shelljs": "^0.7.0"
   },
   "devDependencies": {
+    "chai": "^3.5.0",
     "eslint": "^3.2.0",
     "eslint-config-airbnb": "^9.0.1",
     "eslint-config-airbnb-base": "^5.0.1",
     "eslint-plugin-import": "^1.12.0",
-    "eslint-plugin-jsx-a11y": "^2.0.1"
+    "eslint-plugin-jsx-a11y": "^2.0.1",
+    "mocha": "^3.0.0"
   }
 }