diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 57a3293..5dbe965 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: ['7.4', '8.0']
+        php-version: ['8.0', '8.1']
+        dependencies: ['lowest', 'highest']
     name: 'PHPUnit'
     steps:
       - name: Checkout
@@ -19,17 +20,10 @@ jobs:
           php-version: ${{ matrix.php-version }}
           extensions: mbstring, intl
           coverage: xdebug
-      - name: Get Composer Cache Directory
-        id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - name: Cache dependencies
-        uses: actions/cache@v2
+      - name: Composer
+        uses: "ramsey/composer-install@v2"
         with:
-          path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
-          restore-keys: ${{ runner.os }}-composer-
-      - name: Install Dependencies
-        run: composer install
+          dependency-versions: ${{ matrix.dependencies }}
       - name: PHPUnit
         run: vendor/bin/phpunit --coverage-clover=coverage.clover
       - uses: codecov/codecov-action@v1
@@ -39,7 +33,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['7.4', '8.0']
+        php-version: ['8.0', '8.1']
+        dependencies: ['lowest', 'highest']
     name: 'Psalm'
     steps:
       - name: Checkout
@@ -49,24 +44,17 @@ jobs:
         with:
           php-version: ${{ matrix.php-version }}
           extensions: mbstring, intl
-      - name: Get Composer Cache Directory
-        id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - name: Cache dependencies
-        uses: actions/cache@v2
+      - name: Composer
+        uses: "ramsey/composer-install@v2"
         with:
-          path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
-          restore-keys: ${{ runner.os }}-composer-
-      - name: Install Dependencies
-        run: composer install
+          dependency-versions: ${{ matrix.dependencies }}
       - name: Psalm
         run: vendor/bin/psalm --shepherd
   cs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['7.4']
+        php-version: ['8.0']
     name: 'CS'
     steps:
       - name: Checkout
@@ -76,16 +64,7 @@ jobs:
         with:
           php-version: ${{ matrix.php-version }}
           extensions: mbstring, intl
-      - name: Get Composer Cache Directory
-        id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - name: Cache dependencies
-        uses: actions/cache@v2
-        with:
-          path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-${{ matrix.php-version }}-composer-${{ hashFiles('**/composer.json') }}
-          restore-keys: ${{ runner.os }}-${{ matrix.php-version }}-composer-
-      - name: Install Dependencies
-        run: composer install --no-progress
+      - name: Composer
+        uses: "ramsey/composer-install@v2"
       - name: CS
-        run: vendor/bin/php-cs-fixer fix --diff --dry-run --diff-format udiff
+        run: vendor/bin/php-cs-fixer fix --diff --dry-run
diff --git a/.php_cs.dist b/.php-cs-fixer.dist.php
similarity index 100%
rename from .php_cs.dist
rename to .php-cs-fixer.dist.php
diff --git a/README.md b/README.md
index 7d6608c..626e2c4 100644
--- a/README.md
+++ b/README.md
@@ -21,22 +21,16 @@ use Innmind\TimeWarp\{
     Halt\Usleep,
     Halt,
 };
-use Innmind\TimeContinuum\{
-    Clock,
-    Earth,
-    Earth\Period\Minute,
-};
+use Innmind\TimeContinuum\Earth\Period\Minute;
 
-function yourApp(
-    Clock $clock,
-    Halt $halt
-): void {
+function yourApp(Halt $halt): void
+{
     // do something
-    $halt($clock, new Minute(42));
+    $halt(new Minute(42));
     // do some more
 }
 
-yourApp(new Earth\Clock, new Usleep);
+yourApp(new Usleep);
 ```
 
 This example will halt your program for 42 minutes.
@@ -47,5 +41,5 @@ This example will halt your program for 42 minutes.
 use Innmind\TimeWarp\Halt\Logger;
 use Psr\Log\LoggerInterface;
 
-$halt = new Logger($halt, /** an instance of LoggerInterface */);
+$halt = Logger::psr($halt, /** an instance of LoggerInterface */);
 ```
diff --git a/composer.json b/composer.json
index a8b87c0..1b09d45 100644
--- a/composer.json
+++ b/composer.json
@@ -8,16 +8,16 @@
     "authors": [
         {
             "name": "Baptiste Langlade",
-            "email": "langlade.baptiste@gmail.com"
+            "email": "baptiste.langlade@hey.com"
         }
     ],
     "support": {
         "issues": "http://github.com/Innmind/TimeWarp/issues"
     },
     "require": {
-        "php": "~7.4|~8.0",
-        "innmind/time-continuum": "~2.0",
-        "psr/log": "^1.1"
+        "php": "~8.0",
+        "innmind/time-continuum": "~3.0",
+        "psr/log": "~3.0"
     },
     "autoload": {
         "psr-4": {
@@ -33,6 +33,6 @@
     "require-dev": {
         "phpunit/phpunit": "~9.0",
         "vimeo/psalm": "~4.1",
-        "innmind/coding-standard": "^1.0"
+        "innmind/coding-standard": "~2.0"
     }
 }
diff --git a/src/Halt.php b/src/Halt.php
index 92cd014..152928a 100644
--- a/src/Halt.php
+++ b/src/Halt.php
@@ -3,15 +3,12 @@
 
 namespace Innmind\TimeWarp;
 
-use Innmind\TimeContinuum\{
-    Clock,
-    Period,
-};
+use Innmind\TimeContinuum\Period;
 
 interface Halt
 {
     /**
      * Halt the program for the given period
      */
-    public function __invoke(Clock $clock, Period $period): void;
+    public function __invoke(Period $period): void;
 }
diff --git a/src/Halt/Logger.php b/src/Halt/Logger.php
index 4fddb02..9a79145 100644
--- a/src/Halt/Logger.php
+++ b/src/Halt/Logger.php
@@ -4,10 +4,7 @@
 namespace Innmind\TimeWarp\Halt;
 
 use Innmind\TimeWarp\Halt;
-use Innmind\TimeContinuum\{
-    Clock,
-    Period,
-};
+use Innmind\TimeContinuum\Period;
 use Psr\Log\LoggerInterface;
 
 final class Logger implements Halt
@@ -15,13 +12,13 @@ final class Logger implements Halt
     private Halt $halt;
     private LoggerInterface $logger;
 
-    public function __construct(Halt $halt, LoggerInterface $logger)
+    private function __construct(Halt $halt, LoggerInterface $logger)
     {
         $this->halt = $halt;
         $this->logger = $logger;
     }
 
-    public function __invoke(Clock $clock, Period $period): void
+    public function __invoke(Period $period): void
     {
         $this->logger->debug('Halting current process...', ['period' => [
             'years' => $period->years(),
@@ -32,6 +29,11 @@ public function __invoke(Clock $clock, Period $period): void
             'seconds' => $period->seconds(),
             'milliseconds' => $period->milliseconds(),
         ]]);
-        ($this->halt)($clock, $period);
+        ($this->halt)($period);
+    }
+
+    public static function psr(Halt $halt, LoggerInterface $logger): self
+    {
+        return new self($halt, $logger);
     }
 }
diff --git a/src/Halt/Usleep.php b/src/Halt/Usleep.php
index 6e3cfc0..02796f3 100644
--- a/src/Halt/Usleep.php
+++ b/src/Halt/Usleep.php
@@ -7,10 +7,7 @@
     Halt,
     PeriodToMilliseconds,
 };
-use Innmind\TimeContinuum\{
-    Clock,
-    Period,
-};
+use Innmind\TimeContinuum\Period;
 
 final class Usleep implements Halt
 {
@@ -21,10 +18,9 @@ public function __construct()
         $this->periodToMilliseconds = new PeriodToMilliseconds;
     }
 
-    public function __invoke(Clock $clock, Period $period): void
+    public function __invoke(Period $period): void
     {
-        \usleep(
-            ($this->periodToMilliseconds)($period) * 1000
-        );
+        /** @psalm-suppress ArgumentTypeCoercion todo update types to fix this error */
+        \usleep(($this->periodToMilliseconds)($period) * 1000);
     }
 }
diff --git a/src/PeriodToMilliseconds.php b/src/PeriodToMilliseconds.php
index 93eac5c..b7e3cce 100644
--- a/src/PeriodToMilliseconds.php
+++ b/src/PeriodToMilliseconds.php
@@ -8,6 +8,9 @@
 
 final class PeriodToMilliseconds
 {
+    /**
+     * @throws LogicException If any number of months is specified
+     */
     public function __invoke(Period $period): int
     {
         if ($period->months() !== 0) {
diff --git a/tests/Halt/LoggerTest.php b/tests/Halt/LoggerTest.php
index 673d3c6..d25357c 100644
--- a/tests/Halt/LoggerTest.php
+++ b/tests/Halt/LoggerTest.php
@@ -7,10 +7,7 @@
     Halt\Logger,
     Halt,
 };
-use Innmind\TimeContinuum\{
-    Clock,
-    Period,
-};
+use Innmind\TimeContinuum\Period;
 use Psr\Log\LoggerInterface;
 use PHPUnit\Framework\TestCase;
 
@@ -20,7 +17,7 @@ public function testInterface()
     {
         $this->assertInstanceOf(
             Halt::class,
-            new Logger(
+            Logger::psr(
                 $this->createMock(Halt::class),
                 $this->createMock(LoggerInterface::class),
             ),
@@ -29,20 +26,19 @@ public function testInterface()
 
     public function testHalt()
     {
-        $clock = $this->createMock(Clock::class);
         $period = $this->createMock(Period::class);
-        $halt = new Logger(
+        $halt = Logger::psr(
             $inner = $this->createMock(Halt::class),
             $logger = $this->createMock(LoggerInterface::class),
         );
         $inner
             ->expects($this->once())
             ->method('__invoke')
-            ->with($clock, $period);
+            ->with($period);
         $logger
             ->expects($this->once())
             ->method('debug');
 
-        $this->assertNull($halt($clock, $period));
+        $this->assertNull($halt($period));
     }
 }
diff --git a/tests/Halt/UsleepTest.php b/tests/Halt/UsleepTest.php
index d83ec3c..ff12294 100644
--- a/tests/Halt/UsleepTest.php
+++ b/tests/Halt/UsleepTest.php
@@ -7,10 +7,7 @@
     Halt\Usleep,
     Halt,
 };
-use Innmind\TimeContinuum\{
-    Clock,
-    Earth\Period\Millisecond,
-};
+use Innmind\TimeContinuum\Earth\Period\Millisecond;
 use PHPUnit\Framework\TestCase;
 
 class UsleepTest extends TestCase
@@ -25,10 +22,7 @@ public function testHalt()
         $sleep = new Usleep;
 
         $start = \microtime(true);
-        $this->assertNull($sleep(
-            $this->createMock(Clock::class),
-            new Millisecond(500)
-        ));
+        $this->assertNull($sleep(new Millisecond(500)));
         $end = \microtime(true);
         $this->assertEqualsWithDelta(0.5, $end - $start, 0.09); // 90 milliseconds delta allowed
     }
diff --git a/tests/PeriodToMillisecondsTest.php b/tests/PeriodToMillisecondsTest.php
index 2ea81b5..d48c49e 100644
--- a/tests/PeriodToMillisecondsTest.php
+++ b/tests/PeriodToMillisecondsTest.php
@@ -26,7 +26,7 @@ public function testInvokation()
             1,
             1,
             1,
-            1
+            1,
         ));
 
         $this->assertSame(31626061001, $milliseconds);