diff --git a/package.json b/package.json
index 096ae22..b257a11 100644
--- a/package.json
+++ b/package.json
@@ -58,6 +58,7 @@
     "js-sequence-diagrams": "^1000000.0.6",
     "js-url": "^2.3.0",
     "js-yaml": "^3.7.0",
+    "jsdom-nogyp": "^0.8.3",
     "keymaster": "^1.6.2",
     "list.js": "^1.5.0",
     "lodash": "^4.17.4",