diff --git a/requirements.txt b/requirements.txt
index 007d9b1..50b8502 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -62,7 +62,7 @@ pyrsistent==0.15.4
 python-dateutil==2.8.0
 pytz==2019.1
 PyWavelets==1.0.3
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==18.0.1
 requests==2.22.0
 retrying==1.3.3