diff --git a/greentulip/__init__.py b/greentulip/__init__.py
index f7d4a1e..ca435b6 100644
--- a/greentulip/__init__.py
+++ b/greentulip/__init__.py
@@ -3,15 +3,15 @@
 # License: Apache 2.0
 ##
 
-"""greentulip package allows to compose greenlets and tulip coroutines."""
+"""greentulip package allows to compose greenlets and asyncio coroutines."""
 
 __all__ = ['task', 'yield_from']
 
 
 import greenlet
 
-import tulip
-from tulip import unix_events, tasks, futures
+import asyncio
+from asyncio import unix_events, tasks, futures
 
 
 class _LoopGreenlet(greenlet.greenlet):
@@ -26,16 +26,16 @@ class _TaskGreenlet(greenlet.greenlet):
     ``@greentulip.task`` is executed in this greenlet"""
 
 
-class GreenTask(tulip.Task):
+class GreenTask(asyncio.Task):
     def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
+        super(GreenTask, self).__init__(*args, **kwargs)
         self._greenlet = None
 
-    def _step(self, value=tasks._marker, exc=None):
+    def _step(self, value=None, exc=None):
         if self._greenlet is None:
             # Means that the task is not currently in a suspended greenlet
             # waiting for results for "yield_from"
-            ovr = super()._step
+            ovr = super(GreenTask, self)._step
             self._greenlet = _TaskGreenlet(ovr)
 
             # Store a reference to the current task for "yield_from"
@@ -67,16 +67,16 @@ class GreenTask(tulip.Task):
                 self._greenlet = None
 
 
-class _GreenLoopMixin:
+class _GreenLoopMixin(object):
     def _green_run(self, method, args, kwargs):
         return _LoopGreenlet(method).switch(*args, **kwargs)
 
     def run_until_complete(self, *args, **kwargs):
-        ovr = super().run_until_complete
+        ovr = super(_GreenLoopMixin, self).run_until_complete
         return self._green_run(ovr, args, kwargs)
 
     def run_forever(self, *args, **kwargs):
-        ovr = super().run_forever
+        ovr = super(_GreenLoopMixin, self).run_forever
         return self._green_run(ovr, args, kwargs)
 
 
@@ -84,7 +84,7 @@ class GreenUnixSelectorLoop(_GreenLoopMixin, unix_events.SelectorEventLoop):
     pass
 
 
-class GreenEventLoopPolicy(tulip.DefaultEventLoopPolicy):
+class GreenEventLoopPolicy(asyncio.DefaultEventLoopPolicy):
 
     def new_event_loop(self):
         return GreenUnixSelectorLoop()
@@ -132,7 +132,7 @@ def task(func):
     """A decorator, allows use of ``yield_from`` in the decorated or
     subsequent coroutines."""
 
-    coro = tulip.coroutine(func)
+    coro = asyncio.coroutine(func)
 
     def task_wrapper(*args, **kwds):
         return GreenTask(coro(*args, **kwds))
@@ -140,5 +140,5 @@ def task(func):
     return task_wrapper
 
 
-class _YIELDED:
+class _YIELDED(object):
     """Marker, don't use it"""
diff --git a/greentulip/socket.py b/greentulip/socket.py
index d364042..5990fbb 100644
--- a/greentulip/socket.py
+++ b/greentulip/socket.py
@@ -8,7 +8,7 @@ Use ``greentulip.socket`` in the same way as you would use stdlib's
 ``socket.socket`` in ``greentulip.task`` tasks or coroutines invoked
 from them.
 """
-import tulip
+import asyncio
 from socket import error, SOCK_STREAM
 from socket import socket as std_socket
 
@@ -24,7 +24,7 @@ class socket:
         else:
             self._sock = std_socket(*args, **kwargs)
         self._sock.setblocking(False)
-        self._loop = tulip.get_event_loop()
+        self._loop = asyncio.get_event_loop()
         assert isinstance(self._loop, GreenUnixSelectorLoop), \
             'GreenUnixSelectorLoop event loop is required'
 
@@ -169,7 +169,7 @@ class WriteFile:
 
 
 def create_connection(address: tuple, timeout=None):
-    loop = tulip.get_event_loop()
+    loop = asyncio.get_event_loop()
     host, port = address
 
     rslt = yield_from(