diff --git a/requirements.txt b/requirements.txt
index d9a58b5b6..e38a00257 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,5 @@ netaddr==0.7.19
 pbr==5.4.4
 jmespath==0.9.5
 ruamel.yaml==0.16.10
+ruamel.yaml.clib==0.2.2
 MarkupSafe==1.1.1