diff --git a/requirements.txt b/requirements.txt
index 00e94b7..2521c5e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -76,7 +76,7 @@ pyspark==3.0.0.dev2
 python-dateutil==2.8.1
 pytz==2019.3
 PyWavelets==1.1.1
-PyYAML==5.3.1
+PyYAML==5.4
 pyzmq==19.0.0
 requests==2.23.0
 retrying==1.3.3