diff --git a/requirements.txt b/requirements.txt
index 6fe11c4..9251578 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -54,7 +54,7 @@ python-coveralls==2.9.3
 python-dateutil==2.8.0
 python3-openid==3.1.0
 pytz==2019.2
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 requests-oauthlib==1.2.0
 simple-salesforce==0.74.3