diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b22266b7a..6f9588cb3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,6 +28,7 @@ jobs:
                     - '8.1'
                     - '8.2'
                     - '8.3'
+                    - '8.4'
 
         steps:
             - name: "Checkout code"
@@ -79,6 +80,7 @@ jobs:
                     - '8.1'
                     - '8.2'
                     - '8.3'
+                    - '8.4'
                 extension:
                     - 'cache-extra'
                     - 'cssinliner-extra'