diff --git a/requirements.txt b/requirements.txt
index 535963d9..e82f5cb6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ MarkupSafe==0.23
 pathtools==0.1.2
 Pygments==2.0.2
 pytz==2015.4
-PyYAML==3.11
+PyYAML==5.4
 recommonmark
 six==1.9.0
 snowballstemmer==1.2.0