diff --git a/docs/requirements.txt b/docs/requirements.txt
index 32ccb12..c0680c3 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -9,7 +9,7 @@ MarkupSafe==1.1.1
 mkdocs==1.1.2
 nltk==3.5
 pkg-resources==0.0.0
-PyYAML==5.3.1
+PyYAML==5.4
 regex==2020.7.14
 six==1.15.0
 tornado==6.0.4