diff --git a/CHANGELOG.md b/CHANGELOG.md
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--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,14 @@
+# Under development: FlatPress 1.3.1 "Andante"
+## Changed requirements
+- FlatPress 1.3.1 runs under PHP up to **8.3**; minimum required PHP version increases to **7.1**.
+- Also, the PHP extension [**intl**](https://www.php.net/manual/book.intl.php) becomes mandatory.
+
+## General
+- Template engine Smarty updated to version 4.4.1 ([#376](https://github.com/flatpressblog/flatpress/pull/376))
+- <sub><i>The Smarty API has changed significantly from v2 to v4 - [please make sure your themes and plugins continue to work with the new Smarty version](https://wiki.flatpress.org/doc:tips:smarty2to4)!</i></sub>
+- The fixed "Stats" panel has been converted into a plugin. ([#373](https://github.com/flatpressblog/flatpress/pull/373), [#374](https://github.com/flatpressblog/flatpress/pull/374))
+
+
 # 2024-04-07: [FlatPress 1.3 "Andante"](https://github.com/flatpressblog/flatpress/releases/tag/1.3)
 ## Changed requirements
 - FlatPress 1.3 runs under PHP up to **8.3**; minimum required PHP version increases to **7.1**.