diff --git a/requirements.txt b/requirements.txt
index 46969c7..55203cb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -84,7 +84,7 @@ PySocks==1.7.1
 python-dateutil==2.8.1
 pytz==2019.3
 PyWavelets==1.1.1
-PyYAML==5.3.1
+PyYAML==5.4
 pyzmq==19.0.1
 requests==2.23.0
 scikit-image==0.16.2