diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 3d25599..91a8d82 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: "8.1"
+          php-version: "8.3"
 
       - name: Cache composer dependencies
         uses: actions/cache@v4
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index b8d6a96..b9bea8c 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -9,7 +9,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest, windows-latest]
-        php: [8.1, 8.2, 8.3]
+        php: [8.3, 8.4]
         stability: [prefer-lowest, prefer-stable]
 
     name: P${{ matrix.php }} - ${{ matrix.stability }} - ${{ matrix.os }}
diff --git a/composer.json b/composer.json
index c438c6d..c8e5868 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         }
     ],
     "require": {
-        "php": "^8.1|^8.2|^8.3"
+        "php": "^8.3|^8.4"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.85",