diff --git a/index.js b/index.js
index a565f4df..7ff597c2 100644
--- a/index.js
+++ b/index.js
@@ -48,6 +48,7 @@ module.exports = function (source, map) {
     var options  = params.plugins || loader.options.postcss;
     var pack     = params.pack;
     var callback = loader.async();
+
     var configPath;
 
     if (params.config) {
@@ -72,6 +73,9 @@ module.exports = function (source, map) {
         }
     }).then(function (config) {
         if ( !config ) config = { };
+
+        if ( config.file ) loader.addDependency(config.file);
+
         var plugins = config.plugins || [];
 
         var opts  = assign({}, config.options, {
diff --git a/package.json b/package.json
index 03fc2db3..24b427bb 100644
--- a/package.json
+++ b/package.json
@@ -2,10 +2,7 @@
   "name": "postcss-loader",
   "version": "1.2.1",
   "description": "PostCSS loader for webpack",
-  "engines": {
-    "node": ">=0.12",
-    "npm": ">=3"
-  },
+  "engines": { "node": ">=0.12" },
   "keywords": [
     "webpack",
     "loader",
@@ -19,8 +16,8 @@
   "dependencies": {
     "loader-utils": "^0.2.16",
     "object-assign": "^4.1.0",
-    "postcss": "^5.2.8",
-    "postcss-load-config": "^1.0.0"
+    "postcss": "^5.2.9",
+    "postcss-load-config": "^1.1.0"
   },
   "devDependencies": {
     "eslint": "^3.12.2",