diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index d87fa7d..35da2dc 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: ['8.1', '8.2', '8.3']
+        php-version: ['8.1', '8.2', '8.3', '8.4']
         test-command: ['test']
 
     name: Test PHP ${{ matrix.php-version }}
@@ -23,7 +23,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php-version }}
-          tools: composer:v1
+          tools: composer:v2
       - name: Validate composer.json and composer.lock
         run: |
           composer --version
diff --git a/composer.json b/composer.json
index 94ffcc3..2f582a5 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
   },
   "require": {
     "php": ">=8.1",
-    "psr/clock": "1.0.0"
+    "psr/clock": "^1.0.0"
   },
   "require-dev": {
     "ext-json": "*",
diff --git a/composer.lock b/composer.lock
index 3f42c3f..df4636a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "985a6450484f3f980bdcbd204bfcd698",
+    "content-hash": "914ef385654d62e7ca8a9ea1303f9c1e",
     "packages": [
         {
             "name": "psr/clock",