diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6dd7b49..b5f96e9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,8 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest]
-        php-version: ['8.1', '8.2']
+        php-version: ['8.1', '8.2', '8.3']
+        dependencies: ['lowest', 'highest']
     name: 'PHPUnit'
     steps:
       - name: Checkout
@@ -22,6 +23,8 @@ jobs:
           ini-values: xdebug.max_nesting_level=2048
       - name: Composer
         uses: "ramsey/composer-install@v2"
+        with:
+          dependency-versions: ${{ matrix.dependencies }}
       - name: PHPUnit
         run: vendor/bin/phpunit --coverage-clover=coverage.clover
       - uses: codecov/codecov-action@v1
@@ -31,7 +34,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['8.1', '8.2']
+        php-version: ['8.1', '8.2', '8.3']
+        dependencies: ['lowest', 'highest']
     name: 'Psalm'
     steps:
       - name: Checkout
@@ -43,6 +47,8 @@ jobs:
           extensions: mbstring, intl
       - name: Composer
         uses: "ramsey/composer-install@v2"
+        with:
+          dependency-versions: ${{ matrix.dependencies }}
       - name: Psalm
         run: vendor/bin/psalm --shepherd
   cs:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd59114..8207a66 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 3.1.0 - 2023-09-24
+
+### Added
+
+- Support for `innmind/immutable:~5.0`
+
 ## 3.0.3 - 2023-05-01
 
 ### Fixed
diff --git a/composer.json b/composer.json
index 1ff97d5..5d9bbfa 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
     },
     "require": {
         "php": "~8.1",
-        "innmind/immutable": "~4.13",
+        "innmind/immutable": "~4.13|~5.0",
         "ramsey/uuid": "~4.7",
         "innmind/operating-system": "~3.7",
         "innmind/framework": "~1.1",
diff --git a/src/Profiler/Load.php b/src/Profiler/Load.php
index c8dae5e..977e9eb 100644
--- a/src/Profiler/Load.php
+++ b/src/Profiler/Load.php
@@ -66,6 +66,7 @@ public function __invoke(Directory $raw): Maybe
             })
             ->flatMap(function($start) use ($raw) {
                 if (!\is_array($start)) {
+                    /** @var Maybe<Profile> */
                     return Maybe::nothing();
                 }
 
@@ -110,6 +111,7 @@ private function exit(Profile $profile, Directory $raw): Profile
             })
             ->flatMap(static function($exit) {
                 if (!\is_array($exit)) {
+                    /** @var Maybe<array{string, Status}> */
                     return Maybe::nothing();
                 }