diff --git a/requirements.txt b/requirements.txt
index 8681eb9..25fb988 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -57,7 +57,7 @@ pyparsing==2.4.0
 pyrsistent==0.15.1
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1
+PyYAML==5.4
 querystring-parser==1.2.3
 requests==2.21.0
 retrying==1.3.3