diff --git a/requirements.txt b/requirements.txt
index a69ec6b..fa2c1e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ mock==2.0.0
 numpy==1.15.3
 pbr==5.1.0
 protobuf==3.6.1
-PyYAML==3.13
+PyYAML==5.4
 scikit-learn==0.17.1
 scipy==1.1.0
 six==1.11.0