diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 8be9545..96b6dc0 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -23,6 +23,7 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - "8.4"
 
     steps: