diff --git a/lib/module.js b/lib/module.js
index cd876c82..03b9ff98 100644
--- a/lib/module.js
+++ b/lib/module.js
@@ -30,9 +30,17 @@ module.exports = async function (moduleOptions) {
     /*
     ** Set PostCSS config (before nuxt-purgecss)
     */
-    this.options.build.postcss.preset.stage = 1 // see https://tailwindcss.com/docs/using-with-preprocessors#future-css-features
-    this.options.build.postcss.plugins = this.options.build.postcss.plugins || {}
-    this.options.build.postcss.plugins.tailwindcss = this.options.build.postcss.plugins.tailwindcss || configPath
+    const { postcss } = this.options.build
+
+    postcss.preset.stage = 1 // see https://tailwindcss.com/docs/using-with-preprocessors#future-css-features
+    postcss.plugins = postcss.plugins || {}
+
+    if (Array.isArray(postcss.plugins)) {
+      postcss.plugins.push(require('tailwindcss')(configPath))
+    } else if (typeof postcss.plugins === 'object') {
+      postcss.plugins.tailwindcss = postcss.plugins.tailwindcss || configPath
+    }
+
     /*
     ** Add nuxt-purgecss module and set config
     ** only for `nuxt build` command