diff --git a/requirements.txt b/requirements.txt
index ac93f0e..203fd3c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 BeautifulSoup==3.2.1
 Jinja2==2.6
-PyYAML==3.11
+PyYAML==5.4
 Pygments==1.4
 Sphinx==1.1.2
 argparse