diff --git a/gulp-tasks/legacy_watch.js b/gulp-tasks/legacy_watch.js
index 895134a7..899782e1 100644
--- a/gulp-tasks/legacy_watch.js
+++ b/gulp-tasks/legacy_watch.js
@@ -3,7 +3,7 @@
 module.exports = function(gulp) {
   return function() {
     var stream = gulp.watch(
-      ['./legacy/**.styl'], ['legacy']
+      ['./legacy/**.styl'], gulp.series('legacy')
     );
     return stream; 
   };
diff --git a/gulp-tasks/scripts_watch.js b/gulp-tasks/scripts_watch.js
index dd34ac46..086772f6 100644
--- a/gulp-tasks/scripts_watch.js
+++ b/gulp-tasks/scripts_watch.js
@@ -2,7 +2,7 @@
 
 module.exports = function(gulp) {
   return function() {
-    var stream = gulp.watch(['./scripts/**/*.js'], ['scripts']);
+    var stream = gulp.watch(['./scripts/**/*.js'], gulp.series('scripts'));
 
     return stream;
   };
diff --git a/gulp-tasks/stylus_watch.js b/gulp-tasks/stylus_watch.js
index b5c28145..21db985d 100644
--- a/gulp-tasks/stylus_watch.js
+++ b/gulp-tasks/stylus_watch.js
@@ -4,7 +4,7 @@ module.exports = function(gulp) {
   return function() {
     var stream = gulp.watch(
       ['./stylesheets/**/**.styl'],
-      ['stylus', 'stylus:ie']
+      gulp.series('stylus', 'stylus:ie')
     );
 
     return stream;
diff --git a/Gulpfile.js b/gulpfile.js
similarity index 96%
rename from Gulpfile.js
rename to gulpfile.js
index dae49f89..1894c04c 100644
--- a/Gulpfile.js
+++ b/gulpfile.js
@@ -54,7 +54,7 @@ gulp.task('docson', () =>
     .src('node_modules/docson/public/**')
     .pipe(gulp.dest(options.paths.docson))
 );
-gulp.task('build', [
+ gulp.task('build', gulp.parallel(
   'fonts',
   'images',
   'legacy',
@@ -62,8 +62,8 @@ gulp.task('build', [
   'scripts',
   'stylus:ie',
   'docson',
-]);
-gulp.task('default', [
+ ));
+gulp.task('default', gulp.parallel(
   'fonts',
   'images',
   'legacy',
@@ -74,4 +74,4 @@ gulp.task('default', [
   'stylus:ie',
   'watch:stylus',
   'watch:legacy',
-]);
+));