diff --git a/bin/setup.js b/bin/setup.js
new file mode 100644
index 0000000..e1616c0
--- /dev/null
+++ b/bin/setup.js
@@ -0,0 +1,111 @@
+const inquirer = require('inquirer')
+const fs = require('fs-extra')
+const globby = require('globby')
+const debug = require('debug')
+
+const _debug = debug('app:bin:setup')
+
+const cssnextFiles = [
+  './*(webpack|src)/**/*.cssnext.*',
+  './src/common/styles.cssnext',
+  './postcss.config.cssnext.js',
+]
+
+const questions = [
+  {
+    type: 'confirm',
+    name: 'setup',
+    message: 'You will use SASS as CSS extension language 😉 . Do you wish to use CSSNEXT 😀 ? This choice is irreversible. Obviously you can install the project again or just use your version control system to discard changes in working directory.',
+    default: false,
+  },
+]
+
+
+function sass() {
+  const sassDebug = debug('app:bin:setup:sass')
+
+  return Promise.resolve()
+    .then(() => {
+      sassDebug('All CSSNEXT (styles, config) files are going to be deleted')
+    })
+    .then(() => {
+      const file = './webpack-assets.json'
+
+      fs.remove(file, (err) => {
+        if (err) return sassDebug(err)
+        return sassDebug(`${file} has been deleted`)
+      })
+    })
+    .then(() => {
+      globby(cssnextFiles)
+        .then((paths) => {
+          paths.forEach((filePath) => {
+            fs.remove(filePath, (err) => {
+              if (err) return sassDebug(err)
+              return sassDebug(`${filePath} has been deleted`)
+            })
+          })
+        })
+    })
+    .then(() => {
+      sassDebug('Congratulations you are going to use SASS 👏 .')
+    })
+}
+
+function cssnext() {
+  const cssnextDebug = debug('app:bin:setup:cssnext')
+
+  return Promise.resolve()
+    .then(() => {
+      cssnextDebug('All SASS (styles, config) files are going to be deleted')
+    })
+    .then(() => {
+      globby(cssnextFiles)
+        .then((paths) => {
+          paths.forEach((filePath) => {
+            const renamedPath = filePath.replace('.cssnext', '')
+
+            try {
+              fs.removeSync(renamedPath)
+              cssnextDebug(`${renamedPath} has been deleted`)
+            } catch (err) {
+              cssnextDebug(err)
+            }
+          })
+        })
+    })
+    .then(() => {
+      globby(cssnextFiles)
+        .then((paths) => {
+          paths.forEach((filePath) => {
+            const renamedPath = filePath.replace('.cssnext', '')
+
+            fs.move(filePath, renamedPath, (err) => {
+              if (err) return cssnextDebug(err)
+              return cssnextDebug(`${filePath} has been renamed to ${renamedPath}`)
+            })
+          })
+
+          const filePath = './src/common/views/AboutView/AboutView.scss'
+          const renamedPath = './src/common/views/AboutView/AboutView.css'
+
+          fs.move(filePath, renamedPath, (err) => {
+            if (err) return cssnextDebug(err)
+            return cssnextDebug(`${filePath} has been renamed to ${renamedPath}`)
+          })
+        })
+    })
+    .then(() => {
+      cssnextDebug('Congratulations you are going to use CSSNEXT 👏 .')
+    })
+}
+
+inquirer.prompt(questions)
+  .then(answers => (answers.setup ? cssnext() : sass()))
+  .then(() => {
+    _debug('This setup (bin/setup.js) will self-destruct 💥 .')
+  })
+  .catch((err) => {
+    _debug('Setup encountered an error.', err)
+    process.exit(1)
+  })