diff --git a/requirements.txt b/requirements.txt
index 933068a..7e288d4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ pyasn1-modules==0.2.8
 pyparsing==2.4.0
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.4
 requests==2.22.0
 requests-oauthlib==1.3.0
 retrying==1.3.3