diff --git a/bot.js b/bot.js
index 6ff5652..0d96b50 100644
--- a/bot.js
+++ b/bot.js
@@ -4,8 +4,17 @@ if (process.env.NODE_ENV !== "production") {
 let Mastodon = require("mastodon-api");
 let Parser = require("rss-parser");
 let parser = new Parser();
+let maxPostPerScan = process.env.MAX_POST_PER_SCAN;
 
 (async () => {
+  await postFeed();
+
+  setInterval(async () => {
+    await postFeed();
+  }, 20 * 60 * 1000);
+})();
+
+async function postFeed() {
   const M = new Mastodon({
     access_token: `${process.env.MASTODON_ACCESS_KEY}`,
     timeout_ms: 60 * 1000, // optional HTTP request timeout to apply to all requests.
@@ -20,13 +29,20 @@ let parser = new Parser();
   );
   var postDate = new Date(timeline.data[0].created_at);
 
-  feed.items.forEach(async (item) => {
+  let count = 0;
+  feed.items.every(async (item) => {
+    if (count > maxPostPerScan) return false;
+
     let pubDate = new Date(item.pubDate);
 
     if (pubDate > postDate) {
-      M.post("statuses", {
+      count++;
+      await M.post("statuses", {
         status: `${item.title}\n\n#NeoVibe #${process.env.POST_HASHTAG}\n\n${item.link}`,
       });
+      return true;
     }
+
+    return true;
   });
-})();
+}