diff --git a/requirements.txt b/requirements.txt
index ca2e6cc..b278046 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ pycparser==2.19
 python-dateutil==2.8.0
 python-logstash==0.4.6
 pytz==2018.9
-PyYAML==5.1
+PyYAML==5.4
 requests==2.21.0
 scikit-learn==0.20.3
 scipy==1.2.1