diff --git a/requirements.txt b/requirements.txt
index fa28f4a..f5b7803 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -92,7 +92,7 @@ pyrsistent==0.15.1
 python-dateutil==2.8.0
 pytz==2019.1
 PyWavelets==1.0.3
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==18.0.1
 qtconsole==4.4.3
 requests==2.21.0