diff --git a/THANKS b/THANKS
index f23b74ed..ff271ad1 100644
--- a/THANKS
+++ b/THANKS
@@ -49,6 +49,7 @@ Dariusz Suchojad <dsuch-github@m.zato.io>
 David Vincelli <david@freshbooks.com>
 David Wolever <david@wolever.net>
 Denis Bilenko <denis.bilenko@gmail.com>
+Diego Oliveira <contact@diegoholiveira.com>
 Dima Barsky <github@kappa.ac93.org>
 Djoume Salvetti <djoume@freshbooks.com>
 Dmitry Medvinsky <me@dmedvinsky.name>
diff --git a/docs/source/news.rst b/docs/source/news.rst
index 8f61b9c8..3267047e 100644
--- a/docs/source/news.rst
+++ b/docs/source/news.rst
@@ -8,6 +8,9 @@ Changelog
 - fix: prevent raising :exc:`AttributeError` when ``--reload`` is not passed
   in case of a :exc:`SyntaxError` raised from the WSGI application.
   (:issue:`1805`, :pr:`1806`)
+- The internal module ``gunicorn.workers.async`` was renamed to ``gunicorn.workers.base_async``
+  since ``async`` is now a reserved word in Python 3.7.
+  (:pr:`1527`)
 
 19.8.1 / 2018/04/30
 ===================
diff --git a/gunicorn/workers/__init__.py b/gunicorn/workers/__init__.py
index 05a3e286..074e0012 100644
--- a/gunicorn/workers/__init__.py
+++ b/gunicorn/workers/__init__.py
@@ -17,6 +17,6 @@ SUPPORTED_WORKERS = {
 }
 
 
-if sys.version_info >= (3, 3):
-    # gaiohttp worker can be used with Python 3.3+ only.
+if sys.version_info >= (3, 4):
+    # gaiohttp worker can be used with Python 3.4+ only.
     SUPPORTED_WORKERS["gaiohttp"] = "gunicorn.workers.gaiohttp.AiohttpWorker"
diff --git a/gunicorn/workers/_gaiohttp.py b/gunicorn/workers/_gaiohttp.py
index cdce4be7..fe378c35 100644
--- a/gunicorn/workers/_gaiohttp.py
+++ b/gunicorn/workers/_gaiohttp.py
@@ -46,7 +46,7 @@ class AiohttpWorker(base.Worker):
         super().init_process()
 
     def run(self):
-        self._runner = asyncio.async(self._run(), loop=self.loop)
+        self._runner = asyncio.ensure_future(self._run(), loop=self.loop)
 
         try:
             self.loop.run_until_complete(self._runner)
diff --git a/gunicorn/workers/async.py b/gunicorn/workers/base_async.py
similarity index 100%
rename from gunicorn/workers/async.py
rename to gunicorn/workers/base_async.py
diff --git a/gunicorn/workers/geventlet.py b/gunicorn/workers/geventlet.py
index f0bb0649..189062c8 100644
--- a/gunicorn/workers/geventlet.py
+++ b/gunicorn/workers/geventlet.py
@@ -24,7 +24,7 @@ from eventlet.wsgi import ALREADY_HANDLED as EVENTLET_ALREADY_HANDLED
 import greenlet
 
 from gunicorn.http.wsgi import sendfile as o_sendfile
-from gunicorn.workers.async import AsyncWorker
+from gunicorn.workers.base_async import AsyncWorker
 
 def _eventlet_sendfile(fdout, fdin, offset, nbytes):
     while True:
diff --git a/gunicorn/workers/ggevent.py b/gunicorn/workers/ggevent.py
index 34ee72a8..fb9d9194 100644
--- a/gunicorn/workers/ggevent.py
+++ b/gunicorn/workers/ggevent.py
@@ -27,7 +27,7 @@ from gevent import pywsgi
 
 import gunicorn
 from gunicorn.http.wsgi import base_environ
-from gunicorn.workers.async import AsyncWorker
+from gunicorn.workers.base_async import AsyncWorker
 from gunicorn.http.wsgi import sendfile as o_sendfile
 
 VERSION = "gevent/%s gunicorn/%s" % (gevent.__version__, gunicorn.__version__)
diff --git a/tests/test_gaiohttp.py b/tests/test_gaiohttp.py
index 6a08c413..e58f36c1 100644
--- a/tests/test_gaiohttp.py
+++ b/tests/test_gaiohttp.py
@@ -50,7 +50,7 @@ class WorkerTests(unittest.TestCase):
         self.worker.loop = mock.Mock()
         self.worker.run()
 
-        self.assertTrue(m_asyncio.async.called)
+        self.assertTrue(m_asyncio.ensure_future.called)
         self.assertTrue(self.worker.loop.run_until_complete.called)
         self.assertTrue(self.worker.loop.close.called)