diff --git a/README.md b/README.md
index 5333464..b420309 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@ Table of contents
   * [Base path](#base-path)
   * [Base URL](#base-url)
   * [Relative paths](#relative-paths)
+* [Cachebuster](#cachebuster)
 * [Image dimensions](#image-dimensions)
 * [Inlining files](#inlining-files)
 * [Full list of options](#full-list-of-options)
@@ -130,7 +131,7 @@ var options = {
 Cachebuster
 -----------
 
-PostCSS Assets can bust the assets cache, changing urls depending on asset’s modification date:
+PostCSS Assets can bust assets cache, changing urls depending on asset’s modification date:
 
 ```js
 var options = {
diff --git a/package.json b/package.json
index 6cd079c..ef2caf2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "postcss-assets",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "PostCSS plugin to manage assets",
   "author": "Vadim Borodean <borodean@gmail.com>",
   "license": "MIT",
@@ -14,7 +14,7 @@
     "image-size": "^0.3.5",
     "js-base64": "^2.1.5",
     "mime": "^1.2.11",
-    "postcss": "^3.0.7"
+    "postcss": "^4.0.0"
   },
   "devDependencies": {
     "tape": "^3.0.3"