diff --git a/requirements.txt b/requirements.txt
index ac4f89f..11a7642 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ ptyprocess==0.6.0
 python-dateutil==2.8.0
 python-dotenv==0.10.3
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.4
 requests==2.22.0
 six==1.12.0
 toml==0.10.0