diff --git a/package.json b/package.json
index 405ac9d..36b8b31 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
         "step": "0.0.x",
         "sphericalmercator": "1.0.x",
         "underscore": "1.1.x",
-        "zlib": "https://github.com/springmeyer/node-zlib/tarball/master"
+        "_zlib": "https://github.com/springmeyer/node-zlib/tarball/master"
     },
     "devDependencies": {
         "expresso": "~0.9.0"