diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cac9c6f59..2994da51c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        php-versions: ['7.4', '8.0']
+        php-versions: ['7.4', '8.0', '8.1']
     name: PHP ${{ matrix.php-versions }} test on ${{ matrix.operating-system }}
 
     services: