diff --git a/requirements.txt b/requirements.txt
index 5ad12d1..7ebf6de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ idna==2.10
 itsdangerous==1.1.0
 Jinja2==2.11.3
 MarkupSafe==1.1.1
-PyYAML==5.4.1
+PyYAML==5.3.1
 requests==2.25.1
 urllib3==1.26.18
 Werkzeug==1.0.1