diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5242dcd8..4108efd0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 **Merged pull requests:**
 
 - Release v2.1.5-2024.05-beta1 🎉
+- Normalizing announce-list [\#337](https://github.com/torrentpier/torrentpier-lts/pull/337) ([belomaxorka](https://github.com/belomaxorka))
 - Fixed announcer-list issue [\#335](https://github.com/torrentpier/torrentpier-lts/pull/335), [\#336](https://github.com/torrentpier/torrentpier-lts/pull/336) ([belomaxorka](https://github.com/belomaxorka))
 - Some other changes / improvements
 
diff --git a/library/includes/functions_torrent.php b/library/includes/functions_torrent.php
index 7d2a06bf..7becd26e 100644
--- a/library/includes/functions_torrent.php
+++ b/library/includes/functions_torrent.php
@@ -545,11 +545,17 @@ function send_torrent_with_passkey ($filename)
 		}
 	}
 
-	// Remove announce-list if empty
+	// Preparing announce-list
 	if (empty($tor['announce-list']))
 	{
+		// Remove announce-list if empty
 		unset($tor['announce-list']);
 	}
+	else
+	{
+		// Normalizing announce-list
+		$tor['announce-list'] = array_unique($tor['announce-list'], SORT_REGULAR);
+	}
 
 	// Add publisher & topic url
 	$publisher_name = $bb_cfg['server_name'];