diff --git a/python-env-requirements.txt b/python-env-requirements.txt
index 3368c38..b1484d8 100644
--- a/python-env-requirements.txt
+++ b/python-env-requirements.txt
@@ -1,5 +1,5 @@
 simplejson==2.1.3
-PyYAML==3.09
+PyYAML==5.4
 WebOb==1.0.1
 PasteDeploy==1.3.4
 PasteScript==1.7.3