diff --git a/cobbler.spec b/cobbler.spec
index 6ad5995..c9ae862 100644
--- a/cobbler.spec
+++ b/cobbler.spec
@@ -29,6 +29,7 @@ Requires: python3-mod_wsgi
 Requires: python3-cheetah
 Requires: python3-netaddr
 Requires: python3-urlgrabber
+Requires: python3-tornado
 
 # syslinux is only available on x86
 %ifarch %{ix86} x86_64