diff --git a/requirements.txt b/requirements.txt
index f781baa..e659bdd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ Markdown==3.2.2
 MarkupSafe==1.1.1
 mkdocs==1.1
 nltk==3.5
-PyYAML==5.3.1
+PyYAML==5.4
 regex==2020.5.7
 six==1.14.0
 tornado==6.0.4