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 d882e56..943e601 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [Unreleased]
+
+### Changed
+
+- Requires PHP `8.4`
+- Requires `innmind/server-control:~7.0`
+
 ## 5.0.0 - 2025-05-08
 
 ### Changed
diff --git a/README.md b/README.md
index e8fbab6..2b1ea0e 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # FileWatch
 
-[![Build Status](https://github.com/innmind/filewatch/workflows/CI/badge.svg?branch=master)](https://github.com/innmind/filewatch/actions?query=workflow%3ACI)
+[![CI](https://github.com/Innmind/FileWatch/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/Innmind/FileWatch/actions/workflows/ci.yml)
 [![codecov](https://codecov.io/gh/innmind/filewatch/branch/develop/graph/badge.svg)](https://codecov.io/gh/innmind/filewatch)
 [![Type Coverage](https://shepherd.dev/github/innmind/filewatch/coverage.svg)](https://shepherd.dev/github/innmind/filewatch)
 
@@ -15,12 +15,9 @@ composer require innmind/file-watch
 ## Usage
 
 ```php
-use Innmind\FileWatch\{
-    Factory,
-    Stop,
-};
+use Innmind\FileWatch\Factory;
 use Innmind\Server\Control\ServerFactory;
-use Innmind\TimeWarp\Halt\Usleep;
+use Innmind\TimeWarp\Halt;
 use Innmind\TimeContinuum\Clock;
 use Innmind\IO\IO;
 use Innmind\Url\Path;
@@ -30,9 +27,9 @@ $watch = Factory::build(
     ServerFactory::build(
         Clock::live(),
         IO::fromAmbientAuthority(),
-        Usleep::new(),
+        Halt::new(),
     )->processes(),
-    Usleep::new(),
+    Halt::new(),
 );
 
 $count = $watch(Path::of('/to/some/file/or/folder'))(0, function(int $count, Continuation $continuation): Continuation {
diff --git a/composer.json b/composer.json
index 80aa487..7368bda 100644
--- a/composer.json
+++ b/composer.json
@@ -15,11 +15,11 @@
         "issues": "http://github.com/Innmind/FileWatch/issues"
     },
     "require": {
-        "php": "~8.2",
-        "innmind/url": "~4.0",
-        "innmind/server-control": "~6.0",
-        "innmind/time-warp": "~4.0",
-        "innmind/time-continuum": "^4.1.1",
+        "php": "~8.4",
+        "innmind/url": "~5.0",
+        "innmind/server-control": "~7.0",
+        "innmind/time-warp": "~5.1",
+        "innmind/time-continuum": "~5.1",
         "psr/log": "~3.0"
     },
     "autoload": {
@@ -33,7 +33,7 @@
         }
     },
     "require-dev": {
-        "innmind/static-analysis": "^1.2.1",
+        "innmind/static-analysis": "~1.3",
         "innmind/coding-standard": "~2.0",
         "innmind/black-box": "~6.1"
     }
diff --git a/src/Ping/OutputDiff.php b/src/Ping/OutputDiff.php
index e41b680..1fd6c77 100644
--- a/src/Ping/OutputDiff.php
+++ b/src/Ping/OutputDiff.php
@@ -49,7 +49,7 @@ public function __invoke(mixed $carry, callable $ping): Attempt
         $result = Sequence::lazy(function() {
             while (true) {
                 yield $this->output();
-                ($this->halt)($this->period);
+                $_ = ($this->halt)($this->period)->memoize();
             }
         })
             ->flatMap(static fn($maybe) => $maybe->match(
@@ -136,11 +136,11 @@ private function diff(Sequence $previous, Sequence $now): bool
     {
         $previous = $previous
             ->map(static fn($chunk) => $chunk->data())
-            ->fold(new Concat)
+            ->fold(Concat::monoid)
             ->toString();
         $now = $now
             ->map(static fn($chunk) => $chunk->data())
-            ->fold(new Concat)
+            ->fold(Concat::monoid)
             ->toString();
 
         return $previous !== $now;
diff --git a/src/Watch.php b/src/Watch.php
index 21b8272..cb0176d 100644
--- a/src/Watch.php
+++ b/src/Watch.php
@@ -4,6 +4,7 @@
 namespace Innmind\FileWatch;
 
 use Innmind\FileWatch\Watch\{
+    Implementation,
     Kind,
     Logger,
     Fallback,
@@ -19,7 +20,7 @@
 final class Watch
 {
     private function __construct(
-        private Kind|Logger $implementation,
+        private Implementation $implementation,
     ) {
     }
 
diff --git a/src/Watch/Implementation.php b/src/Watch/Implementation.php
new file mode 100644
index 0000000..57a049d
--- /dev/null
+++ b/src/Watch/Implementation.php
@@ -0,0 +1,15 @@
+<?php
+declare(strict_types = 1);
+
+namespace Innmind\FileWatch\Watch;
+
+use Innmind\FileWatch\Ping;
+use Innmind\Url\Path;
+
+/**
+ * @internal
+ */
+interface Implementation
+{
+    public function __invoke(Path $file): Ping\Implementation;
+}
diff --git a/src/Watch/Kind.php b/src/Watch/Kind.php
index 40e0aa2..393acc4 100644
--- a/src/Watch/Kind.php
+++ b/src/Watch/Kind.php
@@ -9,7 +9,7 @@
 /**
  * @internal
  */
-final class Kind
+final class Kind implements Implementation
 {
     public function __construct(
         private Fallback $files,
@@ -17,6 +17,7 @@ public function __construct(
     ) {
     }
 
+    #[\Override]
     public function __invoke(Path $file): Ping\Implementation
     {
         return match ($file->directory()) {
diff --git a/src/Watch/Logger.php b/src/Watch/Logger.php
index 5a6e677..df9d4a1 100644
--- a/src/Watch/Logger.php
+++ b/src/Watch/Logger.php
@@ -10,14 +10,15 @@
 /**
  * @internal
  */
-final class Logger
+final class Logger implements Implementation
 {
     private function __construct(
-        private Kind $watch,
+        private Implementation $watch,
         private LoggerInterface $logger,
     ) {
     }
 
+    #[\Override]
     public function __invoke(Path $path): Ping\Implementation
     {
         return Ping\Logger::psr(
@@ -27,17 +28,8 @@ public function __invoke(Path $path): Ping\Implementation
         );
     }
 
-    public static function psr(Kind|self $watch, LoggerInterface $logger): self
+    public static function psr(Implementation $watch, LoggerInterface $logger): self
     {
-        return new self(self::extract($watch), $logger);
-    }
-
-    private static function extract(Kind|self $watch): Kind
-    {
-        if ($watch instanceof Kind) {
-            return $watch;
-        }
-
-        return self::extract($watch->watch);
+        return new self($watch, $logger);
     }
 }
diff --git a/tests/FunctionalTest.php b/tests/FunctionalTest.php
index fb74172..f990150 100644
--- a/tests/FunctionalTest.php
+++ b/tests/FunctionalTest.php
@@ -7,12 +7,12 @@
     Factory,
     Watch,
 };
-use Innmind\Server\Control\Server\{
-    Processes\Unix,
-    Command,
+use Innmind\Server\Control\{
+    ServerFactory,
+    Server\Command,
 };
 use Innmind\TimeContinuum\Clock;
-use Innmind\TimeWarp\Halt\Usleep;
+use Innmind\TimeWarp\Halt;
 use Innmind\IO\IO;
 use Innmind\Url\Path;
 use Psr\Log\NullLogger;
@@ -34,16 +34,16 @@ public function tearDown(): void
     public function testWatchFile()
     {
         \touch('/tmp/innmind/watch-file');
-        $processes = Unix::of(
+        $processes = ServerFactory::build(
             Clock::live(),
             IO::fromAmbientAuthority(),
-            Usleep::new(),
-        );
+            Halt::new(),
+        )->processes();
         $process = $processes->execute(Command::background(
             'sleep 1 && echo foo >> /tmp/innmind/watch-file && sleep 1 && echo foo >> /tmp/innmind/watch-file && sleep 1 && echo foo >> /tmp/innmind/watch-file',
         ));
 
-        $watch = Factory::build($processes, Usleep::new());
+        $watch = Factory::build($processes, Halt::new());
 
         $either = $watch(Path::of('/tmp/innmind/watch-file'))(0, static function($count, $continuation) {
             ++$count;
@@ -66,16 +66,16 @@ public function testWatchFile()
 
     public function testWatchDirectory()
     {
-        $processes = Unix::of(
+        $processes = ServerFactory::build(
             Clock::live(),
             IO::fromAmbientAuthority(),
-            Usleep::new(),
-        );
+            Halt::new(),
+        )->processes();
         $process = $processes->execute(Command::background(
             'sleep 1 && touch /tmp/innmind/watch-file && sleep 1 && rm /tmp/innmind/watch-file',
         ));
 
-        $watch = Factory::build($processes, Usleep::new());
+        $watch = Factory::build($processes, Halt::new());
 
         $either = $watch(Path::of('/tmp/innmind/'))(0, static function($count, $continuation) {
             ++$count;
@@ -98,13 +98,13 @@ public function testWatchDirectory()
 
     public function testReturnErrorWhenWatchingUnknownFile()
     {
-        $processes = Unix::of(
+        $processes = ServerFactory::build(
             Clock::live(),
             IO::fromAmbientAuthority(),
-            Usleep::new(),
-        );
+            Halt::new(),
+        )->processes();
 
-        $watch = Factory::build($processes, Usleep::new());
+        $watch = Factory::build($processes, Halt::new());
 
         $either = $watch(Path::of('/unknown/'))(null, static fn($_, $continuation) => $continuation);
 
@@ -118,16 +118,16 @@ public function testReturnErrorWhenWatchingUnknownFile()
     public function testLog()
     {
         \touch('/tmp/innmind/watch-file');
-        $processes = Unix::of(
+        $processes = ServerFactory::build(
             Clock::live(),
             IO::fromAmbientAuthority(),
-            Usleep::new(),
-        );
+            Halt::new(),
+        )->processes();
         $process = $processes->execute(Command::background(
             'sleep 1 && echo foo >> /tmp/innmind/watch-file && sleep 1 && echo foo >> /tmp/innmind/watch-file && sleep 1 && echo foo >> /tmp/innmind/watch-file',
-        ));
+        ))->unwrap();
 
-        $inner = Factory::build($processes, Usleep::new());
+        $inner = Factory::build($processes, Halt::new());
         $watch = Watch::logger($inner, new NullLogger);
 
         $either = $watch(Path::of('/tmp/innmind/watch-file'))(0, static function($count, $continuation) {