diff --git a/requirements.txt b/requirements.txt
index b822d57d..fb283796 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,5 @@ dictdiffer
 jinja2
 kubernetes ~= 1.0.0
 python-string-utils
-ruamel.yaml
+ruamel.yaml<0.15
 six