diff --git a/requirements.txt b/requirements.txt
index b9ce84d..8ee0d40 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,7 +81,7 @@ pytest==4.1.1
 python-dateutil==2.7.5
 python-Levenshtein==0.12.0
 pytz==2018.9
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==18.0.1
 qtconsole==4.4.4
 requests==2.21.0