diff --git a/requirements.txt b/requirements.txt
index 536065c..e24c9df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ Paste==1.7.5.1
 PasteDeploy==1.5.0
 PasteScript==1.7.5
 Pillow==4.3.0
-PyYAML==3.10
+PyYAML==5.4
 Pygments==1.5
 SQLAlchemy==0.7.4
 Tempita==0.5.1