diff --git a/etc/requirements.txt b/etc/requirements.txt
index c07d6237..899161f5 100644
--- a/etc/requirements.txt
+++ b/etc/requirements.txt
@@ -10,6 +10,6 @@ blist==1.3.4
 
 pytz==2012h
 numpy==1.6.1
-Cython==0.15.1
+Cython==0.17.1
 
 pandas==0.9.0