diff --git a/requirements.txt b/requirements.txt
index 8ab6d90..cf93d64 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ mkdocs-material-extensions==1.0
 nltk==3.5
 Pygments==2.6.1
 pymdown-extensions==7.1
-PyYAML==5.3.1
+PyYAML==5.4
 regex==2020.6.8
 six==1.15.0
 tornado==6.0.4