diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5afde19..0c9fa36 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 This is the Developer Changelog for Matomo PHP Tracker. All breaking changes or new features are listed below.
 
+## Matomo PHP Tracker 3.4.0
+### Changed
+- a lot of arguments of `MatomoTracker` methods have explicitly types
+- a lot of `MatomoTracker` method return types have strict types
+
 ## Matomo PHP Tracker 3.3.1
 ### Fixed
 - closed curl connection