diff --git a/requirements.txt b/requirements.txt
index cf8a439..7e7fc24 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,6 @@ mock==2.0.0
 nose==1.3.7
 pbr==3.0.1
 python-coveralls==2.9.1
-PyYAML==3.12
+PyYAML==4.2b1
 requests==2.14.2
 six==1.10.0