diff --git a/index.js b/index.js
index 6419322..c845ea4 100755
--- a/index.js
+++ b/index.js
@@ -134,7 +134,7 @@ module.exports = postcss.plugin('postcss-px-to-viewport', function (options) {
     });
 
     if (landscapeRules.length > 0) {
-      var landscapeRoot = new postcss.atRule({ params: '(orientation: landscape)', name: 'media' });
+      var landscapeRoot = new postcss.AtRule({ params: '(orientation: landscape)', name: 'media' });
 
       landscapeRules.forEach(function(rule) {
         landscapeRoot.append(rule);
diff --git a/package.json b/package.json
index deec944..cfa5716 100755
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "postcss-px-to-viewport",
   "description": "A CSS post-processor that converts px to viewport units (vw, vh, vmin, vmax).",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "author": "Dmitry Karpunin <koderfunk@gmail.com>",
   "license": "MIT",
   "repository": {