diff --git a/modules/headscale.nix b/modules/headscale.nix
index 0eba5d1..cfd5a6f 100644
--- a/modules/headscale.nix
+++ b/modules/headscale.nix
@@ -16,6 +16,8 @@ in
         private_key_path: /etc/nixos/keys/headscale-key
         db_type: sqlite3
         db_path: db.sqlite
+        ip_prefixes:
+          - 100.64.0.0/16
         derp:
           urls:
             - https://controlplane.tailscale.com/derpmap/default