diff --git a/requirements.txt b/requirements.txt
index 202e23a..ebf5b75 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ pyparsing==2.2.0
 Pyphen==0.9.4
 python-dateutil==2.6.1
 pytz==2017.3
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.4
 s3transfer==0.1.12
 scipy==1.0.0