diff --git a/requirements.txt b/requirements.txt
index 9530580..eef9c0a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ mkdocs-material-extensions==1.0.1
 nltk==3.5
 Pygments==2.7.1
 pymdown-extensions==8.0.1
-PyYAML==5.3.1
+PyYAML==5.4
 regex==2020.10.15
 six==1.15.0
 tornado==6.0.4