diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index a306550..e57fe82 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -24,6 +24,7 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - "8.4"
 
         include:
           - php-version: '7.2'