diff --git a/requirements.txt b/requirements.txt
index de771d7..dbba1b4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 Jinja2==2.7.3
 Markdown==2.6.2
 MarkupSafe==0.23
-PyYAML==5.1
+PyYAML==5.4
 backports.ssl-match-hostname==3.4.0.2
 certifi==2015.04.28
 ghp-import==0.4.1