diff --git a/requirements.txt b/requirements.txt
index 3f2f1c1..50e5068 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -90,7 +90,7 @@ pyrsistent==0.15.7
 python-dateutil==2.8.1
 pytz==2019.3
 PyWavelets==1.1.1
-PyYAML==5.3.1
+PyYAML==5.4
 pyzmq==18.1.1
 qtconsole==4.7.1
 QtPy==1.9.0