diff --git a/requirements.txt b/requirements.txt
index 5e06efd..1f64c75 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ idna==2.8
 jmespath==0.9.4
 pyasn1==0.4.7
 python-dateutil==2.8.0
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 rsa==3.4.2
 s3transfer==0.2.1