diff --git a/requirements.txt b/requirements.txt
index f07f279..8928e80 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -50,7 +50,7 @@ python-dateutil==2.8.1
 pytz==2019.3
 PyWavelets==1.1.1
 pywin32==227
-PyYAML==5.3
+PyYAML==5.4
 pyzmq==18.1.1
 requests==2.22.0
 requests-oauthlib==1.3.0