diff --git a/requirements.txt b/requirements.txt
index 5866deb..8f2857f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ Django==1.9.2
 Landscape-Client==14.12
 MySQL-python==1.2.5
 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