diff --git a/layout/includes/third-party/newest-comments/artalk.pug b/layout/includes/third-party/newest-comments/artalk.pug
index 2df0bac..61e9c56 100644
--- a/layout/includes/third-party/newest-comments/artalk.pug
+++ b/layout/includes/third-party/newest-comments/artalk.pug
@@ -69,8 +69,8 @@ script.
         const result = await res.json()
         const avatarStr = await getSetting()
         const { mirror, params, default:defaults } = avatarStr.frontend_conf.gravatar
-        const avatarCdn = !{avatarCdn} || mirror
-        let avatarDefault = !{avatarDefault} || params || defaults
+        const avatarCdn = '!{avatarCdn}' || mirror
+        let avatarDefault = '!{avatarDefault}' || params || defaults
         avatarDefault = avatarDefault.startsWith('d=') ? avatarDefault : `d=${avatarDefault}`
         const artalk = result.data.map(function (e) {
           return {