diff --git a/requirements.txt b/requirements.txt
index 4534c8a..928a8c0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -121,7 +121,7 @@ pytest==4.6.3
 python-dateutil==2.8.0
 pytz==2019.1
 PyWavelets==1.0.3
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==18.0.1
 querystring-parser==1.2.3
 requests==2.22.0