diff --git a/README.md b/README.md
index 172e3d6..600d16c 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 Collie is a minimal RSS feed reader application. With Collie, you can:
 
 - subscribe to multiple RSS/Atom feeds to organize your own news feed.
-- receive a real-time notification when a new item is added to the subscribed feed. (By default, it is checked every two minutes.)
+- receive a real-time notification when a new item is added to the subscribed feed. (By default, it is checked every 5 minutes.)
 - and save the items to read again or later.
 
 All you need is a local machine and the Internet. No virtual machine, no cloud infrastructures, no always-on database, and no account registration with privacy information required.
diff --git a/src-tauri/src/models/database.rs b/src-tauri/src/models/database.rs
index e370b89..a1f1d5d 100644
--- a/src-tauri/src/models/database.rs
+++ b/src-tauri/src/models/database.rs
@@ -149,7 +149,7 @@ pub fn migrate(db: &Connection) -> Result<()> {
     )?;
 
     let _ = insert_settings(db, "db_scheme_version", "1");
-    let _ = insert_settings(db, "polling_frequency", "120");
+    let _ = insert_settings(db, "polling_frequency", "300");
     let _ = insert_settings(db, "notification", "1");
     let _ = insert_settings(db, "theme", "system");
     let _ = insert_settings(db, "items_order", "ReceivedDateDesc");
diff --git a/src-tauri/src/worker.rs b/src-tauri/src/worker.rs
index 85aa69d..69b895b 100644
--- a/src-tauri/src/worker.rs
+++ b/src-tauri/src/worker.rs
@@ -43,9 +43,9 @@ fn proxy(db: &Connection) -> Option<String> {
 fn polling_frequency(db: &Connection) -> u64 {
     settings::read(db, &SettingKey::PollingFrequency)
         .map(|x| x.value)
-        .unwrap_or("120".to_string())
+        .unwrap_or("300".to_string())
         .parse()
-        .unwrap_or(120)
+        .unwrap_or(300)
 }
 
 fn notification(db: &Connection) -> bool {