diff --git a/requirements.txt b/requirements.txt
index 869e152..b8279c5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ Jinja2==2.10
 jmespath==0.9.3
 MarkupSafe==1.0
 python-dateutil==2.7.3
-PyYAML==3.13
+PyYAML==5.4
 s3transfer==0.1.13
 six==1.11.0
 urllib3==1.23