diff --git a/index.js b/index.js
index 7cedc61..e7ea4b4 100644
--- a/index.js
+++ b/index.js
@@ -11,8 +11,8 @@ const db     = new Enmap({ name: 'db' });
 let update = async () => {
     const feed = await parser.parseURL(process.env.FEED_URL);
     feed.items.forEach(async item => {
-        if (!db.get(item.content)) {
-            db.set(item.content, true);
+        if (!db.get(item.guid)) {
+            db.set(item.guid, true);
             sendWH(item, feed);
         }
     });