diff --git a/gulpfile.js b/gulpfile.js
index 9f707bfa0..8c198cd86 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -32,9 +32,9 @@ module.exports = {
   buildCompressed: buildTasks.compressed,
   buildGenerators: buildTasks.generators,
   buildAdvancedCompilationTest: buildTasks.advancedCompilationTest,
-  checkin: gulp.series(buildTasks.checkinBuilt, typings.checkinTypings),
+  checkin: gulp.parallel(buildTasks.checkinBuilt, typings.checkinTypings),
   checkinBuilt: buildTasks.checkinBuilt,
-  clean: gulp.series(buildTasks.cleanBuildDir, packageTasks.cleanReleaseDir),
+  clean: gulp.parallel(buildTasks.cleanBuildDir, packageTasks.cleanReleaseDir),
   cleanBuildDir: buildTasks.cleanBuildDir,
   cleanReleaseDir: packageTasks.cleanReleaseDir,
   gitSyncDevelop: gitTasks.syncDevelop,