diff --git a/requirements.txt b/requirements.txt
index a9fbd66..50b504f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ Pillow==6.1.0
 pyparsing==2.4.6
 python-dateutil==2.8.1
 pytz==2019.3
-PyYAML==5.3.1
+PyYAML==5.4
 requests==2.23.0
 scipy==1.4.1
 six==1.14.0