diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 5aeee41..c3b66db 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -26,10 +26,10 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@c541c155eee45413f5b09a52248675b1a2575231 # v2.31.1
         with:
-          php-version: '8.3'
+          php-version: '8.4'
 
-      - name: Install PHPStan
-        run: composer require --dev phpstan/phpstan
+      - name: Remove phpDocumentor temporarily and Install PHPStan
+        run: composer remove --dev --no-update phpdocumentor/phpdocumentor; composer update
 
       - name: Restore cached baseline for PHPStan
         id: cache-baseline-restore
diff --git a/README.md b/README.md
index f030915..2772264 100644
--- a/README.md
+++ b/README.md
@@ -92,7 +92,7 @@ FMDataAPI has "composer.json," so you can add your composer.json file in your pr
 - test
     - Some files for unit testing.
 - .github, docker-compose.yml
-    - Files for GitHub Actions to run CI Jobs.
+    - Files for GitHub Actions to run CI jobs.
 
 ## Licence