diff --git a/package.json b/package.json
index 2ecb362db..c1e844573 100644
--- a/package.json
+++ b/package.json
@@ -34,6 +34,7 @@
     "commander": "~2.1.0",
     "uglifyify": "~1.2.3",
     "soop": "~0.1.5",
-    "bitcore": "~0.1.11"
+    "bitcore": "~0.1.11",
+    "chai": "~1.9.1"
   }
 }