diff --git a/index.js b/index.js
index 61894f8..69563f3 100755
--- a/index.js
+++ b/index.js
@@ -68,7 +68,7 @@ for (var prop in fontVariantProperties) {
 // create if does not exist
 function getFontFeatureSettingsPrevTo(decl) {
   var fontFeatureSettings = null;
-  decl.parent.eachDecl(function(decl) {
+  decl.parent.walkDecls(function(decl) {
     if (decl.prop === "font-feature-settings") {
       fontFeatureSettings = decl;
     }
@@ -88,10 +88,10 @@ function getFontFeatureSettingsPrevTo(decl) {
  */
 module.exports = postcss.plugin("postcss-font-variant", function() {
   return function(styles) {
-    styles.eachRule(function(rule) {
+    styles.walkRules(function(rule) {
       var fontFeatureSettings = null
       // read custom media queries
-      rule.eachDecl(function(decl) {
+      rule.walkDecls(function(decl) {
         if (!fontVariantProperties[decl.prop]) {
           return null
         }
diff --git a/package.json b/package.json
index a7c9b47..d7270b9 100755
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "index.js"
   ],
   "dependencies": {
-    "postcss": "^4.1.16"
+    "postcss": "^5.0.4"
   },
   "devDependencies": {
     "jscs": "^2.1.0",
@@ -30,7 +30,9 @@
     "tape": "^4.0.3"
   },
   "scripts": {
-    "lint": "jscs *.js **/*.js && jshint . --exclude-path .gitignore",
+    "lint": "npm run jscs && npm run jshint",
+    "jscs": "jscs index.js test/index.js",
+    "jshint": "jshint . --exclude-path .gitignore",
     "test": "npm run lint && tape test"
   }
 }