diff --git a/lib/dyndnsd/updater/command_with_bind_zone.rb b/lib/dyndnsd/updater/command_with_bind_zone.rb
index dc9fe63..6f05374 100644
--- a/lib/dyndnsd/updater/command_with_bind_zone.rb
+++ b/lib/dyndnsd/updater/command_with_bind_zone.rb
@@ -15,6 +15,8 @@ module Dyndnsd
         pid = fork do
           exec @command
         end
+        # detach so children don't become zombies
+        Process.detach(pid)
       end
     end
   end