diff --git a/requirements.txt b/requirements.txt
index a5e48c3..f177741 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -62,7 +62,7 @@ pytest-runner==5.2
 python-dateutil==2.8.1
 python-ligo-lw==1.6.0
 pytz==2019.3
-PyYAML==5.3
+PyYAML==5.4
 reproject==0.6
 requests==2.23.0
 Rtree==0.9.4