diff --git a/requirements.txt b/requirements.txt
index a479c6b..33461c5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ pycparser==2.19
 pyparsing==2.4.2
 python-dateutil==2.8.0
 pytz==2019.2
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 scikit-learn==0.21.3
 scipy==1.3.1