diff --git a/pixelflut/pixelflut.py b/pixelflut/pixelflut.py
index 1f24751..caefe08 100755
--- a/pixelflut/pixelflut.py
+++ b/pixelflut/pixelflut.py
@@ -5,7 +5,7 @@ __version__ = '0.6'
 import time
 from gevent import spawn, sleep as gsleep, GreenletExit
 from gevent.socket import socket, SOL_SOCKET, SO_REUSEADDR
-from gevent.coros import Semaphore, RLock
+from gevent.lock import Semaphore, RLock
 from gevent.queue import Queue
 from collections import deque
 import pygame