diff --git a/requirements.txt b/requirements.txt
index 42dd633..badc8b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ pyparsing==2.4.7
 python-dateutil==2.8.1
 python-ternary==1.0.7
 pytz==2020.1
-PyYAML==5.3.1
+PyYAML==5.4
 requests==2.24.0
 scikit-learn==0.23.1
 scipy==1.5.0