diff --git a/requirements.txt b/requirements.txt
index e9902e8..e766388 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ mkdocs-minify-plugin==0.2.1
 pkg-resources==0.0.0
 Pygments==2.4.2
 pymdown-extensions==6.0
-PyYAML==5.1.1
+PyYAML==5.4
 singledispatch==3.4.0.3
 six==1.12.0
 tornado==5.1.1