diff --git a/requirements.txt b/requirements.txt
index 5322a77..c2d9372 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ protobuf==3.9.1
 pyparsing==2.4.2
 python-dateutil==2.8.0
 pytz==2019.2
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 scipy==1.3.1
 six==1.12.0