diff --git a/modules/server/containers/apps/selfmark.nix b/modules/server/containers/apps/selfmark.nix
index 5584f8f..9ae3f71 100644
--- a/modules/server/containers/apps/selfmark.nix
+++ b/modules/server/containers/apps/selfmark.nix
@@ -65,7 +65,7 @@ in {
         CALIBRE_WEB_URL = "https://${serverCfg.containers.calibre.subdomain}.${serverCfg.domain}";
       } // lib.optionalAttrs(serverCfg.containers?authentik) {
         AUTH_METHOD = "proxy";
-        PROXY_AUTH_USER_HEADER = "X-authentik-user";
+        PROXY_AUTH_USER_HEADER = "X-authentik-username";
         PROXY_AUTH_ADMIN_GROUP_HEADER = "X-authentik-groups";
         PROXY_AUTH_ADMIN_GROUP_NAME = "admin";
       } // lib.optionalAttrs(serverCfg.containers?servarr && builtins.elem "prowlarr" serverCfg.containers.servarr.extra.modules) ({