diff --git a/requirements.txt b/requirements.txt
index ccaf7c6..f36c873 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,6 +9,6 @@ Jinja2==2.10.3
 MarkupSafe==1.1.1
 pycparser==2.19
 pyOpenSSL==19.0.0
-PyYAML==5.1.2
+PyYAML==5.4
 six==1.12.0
 Werkzeug==0.16.0