diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bc30100..7d086b1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
     - name: Setup PHP
       uses: shivammathur/setup-php@v2
       with:
-        php-version: '7.4'
+        php-version: '8.1'
         extensions: mbstring, intl
         coverage: none
         tools: phpstan:1.10, cs2pr