diff --git a/requirements.txt b/requirements.txt
index 26435e3..2e050e2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ Cheetah==2.4.4
 Django==1.10.2
 Landscape-Client==14.12
 PAM==0.4.2
-PyYAML==3.10
+PyYAML==5.4
 Twisted-Core==13.2.0
 Twisted-Names==13.2.0
 Twisted-Web==13.2.0