diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 8fc4d7b..1c1acec 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -25,6 +25,7 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - '8.4'
 
     steps:
       - name: Checkout