diff --git a/lib/carto/renderer.js b/lib/carto/renderer.js
index dc5df7d..31c5678 100644
--- a/lib/carto/renderer.js
+++ b/lib/carto/renderer.js
@@ -4,7 +4,7 @@ var carto = require('./index');
 carto.Renderer = function Renderer(env, options) {
     this.env = env || {};
     this.options = options || {};
-    this.options.mapnik_version = this.options.mapnik_version || 'latest';
+    this.options.mapnik_version = this.options.mapnik_version || '3.0.0';
 };
 
 /**
diff --git a/lib/carto/tree/reference.js b/lib/carto/tree/reference.js
index c8edbd2..de0945a 100644
--- a/lib/carto/tree/reference.js
+++ b/lib/carto/tree/reference.js
@@ -214,8 +214,6 @@ ref.validValue = function(env, selector, value) {
     }
 };
 
-ref.setVersion('latest');
-
 tree.Reference = ref;
 
 })(require('../tree'));
diff --git a/package.json b/package.json
index bbcb52e..6c058f1 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   },
   "dependencies": {
     "underscore": "~1.6.0",
-    "mapnik-reference": "~6.0.0",
+    "mapnik-reference": "~6.0.1",
     "optimist": "~0.6.0"
   },
   "devDependencies": {