diff --git a/requirements.txt b/requirements.txt
index 34de61f..69eef0b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,6 +11,6 @@ mkdocs-minify-plugin==0.2.1
 pep562==1.0
 Pygments==2.4.2
 pymdown-extensions==6.1
-PyYAML==5.1.2
+PyYAML==5.4
 six==1.13.0
 tornado==6.0.3