diff --git a/requirements.txt b/requirements.txt
index fb7747a..aa1c9c5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ pysolr==3.8.1
 pytest==3.8.2
 python-dateutil==2.7.3
 pytz==2018.5
-PyYAML==3.13
+PyYAML==5.4
 readme-renderer==22.0
 redis==2.10.6
 requests==2.19.1