diff --git a/requirements.txt b/requirements.txt
index 682099c..ddf7dd5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,5 +4,5 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 pybtex==0.22.2
 Pygments==2.5.2
-PyYAML==5.3.1
+PyYAML==5.4
 six==1.14.0