diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -69,7 +69,6 @@ flake8==2.4.1
 future==0.14.3
 futures==3.0.2
 gprof2dot==2015.12.1
-greenlet==0.4.9
 gunicorn==19.6.0
 
 # TODO: Needs subvertpy and blows up without Subversion headers,