diff --git a/requirements.txt b/requirements.txt
index 4c70116..4232572 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -102,7 +102,7 @@ pytest-pylint==0.14.1
 python-dateutil==2.8.0
 pytz==2019.2
 PyWavelets==1.1.1
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.1.0
 qtconsole==4.5.5
 requests==2.22.0