diff --git a/etc/requirements.txt b/etc/requirements.txt
index 211f3ec9..1d2174ea 100644
--- a/etc/requirements.txt
+++ b/etc/requirements.txt
@@ -10,7 +10,6 @@ blist==1.3.4
 
 pytz==2012h
 numpy==1.6.2
-Cython==0.17.3
 
 pandas==0.9.1
 python-dateutil==2.1