diff --git a/requirements.txt b/requirements.txt
index 5f637d9..0e78a0a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -73,7 +73,7 @@ python-dateutil==2.6.1
 python-editor==1.0.3
 python-mimeparse==1.6.0
 pytz==2017.3
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.4
 s3transfer==0.1.12
 scikit-learn==0.19.1