diff --git a/autoprefixer/gulpfile.js b/autoprefixer/gulpfile.js
index d054cba..d06911d 100644
--- a/autoprefixer/gulpfile.js
+++ b/autoprefixer/gulpfile.js
@@ -1,14 +1,13 @@
 var gulp = require('gulp');
 var autoprefixer = require('gulp-autoprefixer');
 
-
-gulp.task('styles',function() {
+gulp.task('styles', done => {
   gulp.src('css/styles.css')
     .pipe(autoprefixer())
     .pipe(gulp.dest('build'))
+    done();
 });
 
-
 gulp.task('watch',function() {
-  gulp.watch('css/styles.css', ['styles']);
+  gulp.watch('css/styles.css', gulp.series('styles'));
 });