diff --git a/package.json b/package.json
index e4c2a767f..e3884bed2 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "aws-sdk": "^2.1.9",
     "mapbox-gl-test-suite": "git://github.com/mapbox/mapbox-gl-test-suite#master",
     "mkdirp": "^0.5.0",
+    "tap-spec": "^2.2.1",
     "tape": "^3.5.0"
   },
   "scripts": {