diff --git a/requirements.txt b/requirements.txt
index 260beb5..ae5dc3b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ markdown
 numexpr
 oauth2client==3.0
 Pillow
-PyYAML==5.1
+PyYAML==5.4
 psycopg2-binary
 pygments
 python-jose==3.0.1