diff --git a/requirements.txt b/requirements.txt
index 561ab8d..4672dc4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ python-rapidjson==0.5.2
 python-rapidjson-schema==0.1.1
 pytz==2018.4
 requests==2.20.0
-PyYAML==5.1
+PyYAML==5.4
 rethinkdb==2.3.0.post6
 shellescape==3.4.1
 six==1.11.0