diff --git a/requirements.txt b/requirements.txt
index 69e2090..2198607 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -110,7 +110,7 @@ python-dateutil==2.8.0
 python-prctl==1.7
 pytz==2018.9
 PyWavelets==1.0.2
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==17.1.2
 query-string==2019.4.13
 queuelib==1.5.0