diff --git a/requirements.txt b/requirements.txt
index f7c4793..f5acd4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ mock==2.0.0
 numpy==1.11.3
 pbr==1.10.0
 protobuf==3.1.0.post1
-PyYAML==5.1
+PyYAML==5.4
 scipy==0.18.1
 six==1.10.0
 tensorflow==1.15.0