diff --git a/setup/requirements.txt b/setup/requirements.txt
index 1254694..31938c5 100644
--- a/setup/requirements.txt
+++ b/setup/requirements.txt
@@ -1,7 +1,7 @@
 Cython==0.19.1
 Markdown==2.3.1
 PyMeta3==0.5.1
-PyYAML==5.1
+PyYAML==5.4
 Pygments==1.6
 WebOb==1.7.0rc1
 bottle==0.11.6