diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 984e9d6..cad0d6d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,18 +12,18 @@ jobs:
         name: Check composer.json
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
             - uses: shivammathur/setup-php@v2
               with:
                   coverage: none
-                  php-version: '8.0'
+                  php-version: '8.4'
             - run: composer validate --strict --no-check-lock
 
     phpstan:
         name: PHPStan
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
             - uses: shivammathur/setup-php@v2
               with:
                   coverage: none
@@ -36,7 +36,7 @@ jobs:
         name: Psalm
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v3
+            - uses: actions/checkout@v4
             - uses: shivammathur/setup-php@v2
               with:
                   coverage: none
@@ -52,10 +52,10 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                php: [ '7.2', '7.3', '7.4', '8.0', '8.1' ]
+                php: [ '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
 
         steps:
-            -   uses: actions/checkout@v3
+            -   uses: actions/checkout@v4
                 with:
                     submodules: true
             -   uses: shivammathur/setup-php@v2