diff --git a/requirements.txt b/requirements.txt
index 3342705..7b5b692 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,7 +81,7 @@ python-dateutil==2.8.1
 pytype==2020.6.1
 pytz==2020.1
 PyWavelets==1.1.1
-PyYAML==5.3.1
+PyYAML==5.4
 pyzmq==19.0.1
 qtconsole==4.7.4
 QtPy==1.9.0