diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 189105d..2f3eecb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,5 +12,3 @@ jobs:
     uses: innmind/github-workflows/.github/workflows/psalm-matrix.yml@main
   cs:
     uses: innmind/github-workflows/.github/workflows/cs.yml@main
-    with:
-      php-version: '8.2'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cdc629e..4a40716 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [Unreleased]
+
+### Changed
+
+- Requires PHP `8.4`
+- Requires `innmind/foundation:~2.1`
+
 ## 4.1.0 - 2025-07-30
 
 ### Changed
diff --git a/composer.json b/composer.json
index 20471d5..214b792 100644
--- a/composer.json
+++ b/composer.json
@@ -15,8 +15,8 @@
         "issues": "http://github.com/Innmind/HttpSession/issues"
     },
     "require": {
-        "php": "~8.2",
-        "innmind/foundation": "~1.3"
+        "php": "~8.4",
+        "innmind/foundation": "~2.1"
     },
     "autoload": {
         "psr-4": {
@@ -31,7 +31,7 @@
     },
     "require-dev": {
         "innmind/black-box": "^6.4.1",
-        "innmind/static-analysis": "^1.2.1",
+        "innmind/static-analysis": "~1.3",
         "innmind/coding-standard": "~2.0"
     }
 }
diff --git a/src/Manager/Native.php b/src/Manager/Native.php
index d063ea4..57e15d1 100644
--- a/src/Manager/Native.php
+++ b/src/Manager/Native.php
@@ -102,7 +102,7 @@ public function save(Session $session): Maybe
         $this->session = null;
         $_SESSION = [];
 
-        return Maybe::just(new SideEffect);
+        return Maybe::just(SideEffect::identity);
     }
 
     #[\Override]
@@ -120,7 +120,7 @@ public function close(Session $session): Maybe
 
         $this->session = null;
 
-        return Maybe::just(new SideEffect);
+        return Maybe::just(SideEffect::identity);
     }
 
     private function configureSessionId(ServerRequest $request): void