diff --git a/requirements.txt b/requirements.txt
index ecba7ba..a38646f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ Flask-Mail==0.9.1
 Jinja2==2.11.3
 MarkupSafe==0.23
 Pillow==2.8.1
-PyYAML==3.11
+PyYAML==5.4
 Werkzeug==0.15.5
 argparse==1.2.1
 astLib==0.8.0