diff --git a/requirements.txt b/requirements.txt
index 0c8387e..c45ce82 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,7 +68,7 @@ pyrsistent==0.15.2
 pyspark==2.4.3
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==18.0.1
 qtconsole==4.4.4
 requests==2.22.0