diff --git a/requirements.txt b/requirements.txt
index e28d9fe..c9c4577 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ protobuf==3.8.0
 pyparsing==2.4.0
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.4
 scipy==1.3.0
 six==1.12.0
 tensorboard==1.14.0