diff --git a/requirements.txt b/requirements.txt
index d2dbc3f..198c035 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ Landscape-Client==14.12
 Markdown==2.6.6
 MarkupSafe==0.18
 PAM==0.4.2
-PyYAML==3.10
+PyYAML==5.4
 Pygments==1.6
 Sphinx==1.2.2
 Twisted-Core==13.2.0