diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b64f36..f14dced 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 # Changelog
 
-## [Unreleased]
+## 3.1.0 - 2023-09-16
+
+### Added
+
+- Support for `innmind/immutable` `5`
 
 ### Removed
 
diff --git a/composer.json b/composer.json
index 9798529..30dc0b2 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     "require": {
         "php": "~8.2",
         "innmind/url": "~4.1",
-        "innmind/immutable": "~4.3"
+        "innmind/immutable": "~4.3|~5.0"
     },
     "autoload": {
         "psr-4": {