diff --git a/requirements.txt b/requirements.txt
index 20666c15..4ffcdda1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ livereload==2.6.1
 Markdown==3.2.1
 MarkupSafe==1.1.1
 mkdocs==1.1
-PyYAML==5.3
+PyYAML==5.4
 singledispatch==3.4.0.3
 six==1.14.0
 tornado==6.0.4