diff --git a/modules/router/default.nix b/modules/router/default.nix
index 9fe4302..ff606d3 100644
--- a/modules/router/default.nix
+++ b/modules/router/default.nix
@@ -314,7 +314,7 @@ in
       dhcp-range = [
         # format TAG,START,END,?MASK,?options,LEASE
         "${bridge},192.168.20.50,192.168.20.90,24h"
-        "${bridge},2001:db8:20::50,2001:db8:20::ffff:ffff:ffff:ffff,24h"
+        "${bridge},2001:db8:20::ffff,2001:db8:20::ffff:ffff:ffff:ffff,24h"
 
         "${devices},192.168.30.10,192.168.30.240,24h"
         "${devices},2001:db8:30::10,2001:db8:30::ffff:ffff:ffff:ffff,24h"