diff --git a/setup.py b/setup.py
index b933a32..7eab299 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@ def is_exe(fpath):
                 return exe_file
     return None
 
-requires_list = ['docopt>=0.6.2', 'ruamel.yaml<=0.15', 'voluptuous>=0.8.7', 'aiocron>=0.3']
+requires_list = ['docopt>=0.6.2', 'ruamel.yaml', 'voluptuous>=0.8.7', 'aiocron>=0.3']
 
 setup(
     name = "chaperone",