diff --git a/setup.py b/setup.py
index 3d6fbb7..bb849b4 100644
--- a/setup.py
+++ b/setup.py
@@ -34,5 +34,5 @@
     author_email='pn.appdev@gmail.com',
     url='https://github.com/pnpnpn/timeout-decorator',
     packages=['timeout_decorator'],
-    install_requires=[],
+    install_requires=['billiard'],
     classifiers=CLASSIFIERS)
diff --git a/timeout_decorator/timeout_decorator.py b/timeout_decorator/timeout_decorator.py
index 2b3121d..8841c95 100644
--- a/timeout_decorator/timeout_decorator.py
+++ b/timeout_decorator/timeout_decorator.py
@@ -11,7 +11,7 @@
 
 import sys
 import time
-import multiprocessing
+import billiard as multiprocessing
 import signal
 from functools import wraps