diff --git a/modules/services/reverseproxy.nix b/modules/services/reverseproxy.nix
index 8dd4dfa..41a5a85 100644
--- a/modules/services/reverseproxy.nix
+++ b/modules/services/reverseproxy.nix
@@ -175,7 +175,10 @@ in
               BIND_NETWORK = "unix";
               METRICS_BIND = "/run/anubis/anubis-${vhostName}/anubis-${vhostName}-metrics.sock";
               TARGET = "unix:///run/nginx/nginx-${vhostName}.sock";
-              COOKIE_DOMAIN = "crans.${mainTld}";
+              COOKIE_DOMAIN = "${vhostName}.crans.${mainTld}";
+              # TODO: db pour mettre en commun les token.
+              # Transitoirement on les sépare
+              COOKIE_PREFIX = "anubis-${vhostName}";
               REDIRECT_DOMAINS = "${vhostName}.crans.${mainTld}";
               SOCKET_MODE = "0660";
               # Secret partagé entre les instances