diff --git a/authentication/python/requirements.txt b/authentication/python/requirements.txt
index 6f268c8..31fc052 100644
--- a/authentication/python/requirements.txt
+++ b/authentication/python/requirements.txt
@@ -7,7 +7,7 @@ itsdangerous==1.1.0
 Jinja2==2.10.3
 MarkupSafe==1.1.1
 oauthlib==3.1.0
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 requests-oauthlib==1.2.0
 urllib3==1.25.6