diff --git a/requirements.txt b/requirements.txt
index d097582..8d450b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,7 +49,7 @@ pyOpenSSL==19.1.0
 pyrsistent==0.16.0
 python-dateutil==2.8.0
 pytz==2019.3
-PyYAML==5.2
+PyYAML==5.4
 requests==2.20.1
 scipy==1.4.1
 semantic-version==2.5.0