diff --git a/package-lock.json b/package-lock.json
index 4e29fda..60983a2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,279 +1,548 @@
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 }
diff --git a/package.json b/package.json
index 847f570..a69aebd 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,10 @@
 {
   "name": "optimize-css-assets-webpack-plugin",
-  "version": "3.2.0",
+  "version": "3.2.1",
   "author": "Nuno Rodrigues",
   "description": "A Webpack plugin to optimize \\ minimize CSS assets.",
   "dependencies": {
-    "cssnano": "^3.4.0",
+    "cssnano": "^4.1.10",
     "last-call-webpack-plugin": "^2.1.2"
   },
   "main": "index.js",