diff --git a/requirements.txt b/requirements.txt
index 978efa2f..3425f281 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,6 @@ livereload==2.6.1
 Markdown==3.1.1
 MarkupSafe==1.1.1
 mkdocs==1.0.4
-PyYAML==5.1.2
+PyYAML==5.4
 six==1.12.0
 tornado==6.0.3