diff --git a/requirements.txt b/requirements.txt
index 9f253e9..eac8e7d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -50,7 +50,7 @@ pyparsing==2.4.2
 pyrsistent==0.15.4
 pytest==5.0.1
 python-dateutil==2.8.0
-PyYAML==5.1.1
+PyYAML==5.4
 pyzmq==18.0.2
 retrying==1.3.3
 ruamel.yaml==0.16.0