diff --git a/package.json b/package.json
index 00726e6d..8f3a1edd 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
     "carto": "^0.16.3",
     "child-process-promise": "^2.1.3",
     "client-sessions": "^0.7.0",
+    "coffee-script": "^1.11.1",
     "color-lerp": "^1.0.5",
     "colors": "^1.1.2",
     "compression": "^1.6.0",