diff --git a/.github/workflows/default.yml b/.github/workflows/default.yml
index 275fa0f..62fb637 100644
--- a/.github/workflows/default.yml
+++ b/.github/workflows/default.yml
@@ -27,6 +27,7 @@ jobs:
           - version: "8.1"
           - version: "8.2"
           - version: "8.3"
+          - version: "8.4"
     env:
       VERSION: ${{ matrix.version }}
 
diff --git a/build.sh b/build.sh
index 283ee44..e6b5813 100755
--- a/build.sh
+++ b/build.sh
@@ -3,7 +3,7 @@
 set -ex
 
 # Arguments: $1 CLI_VERSION
-CLI_VERSION=${1:-8.3}
+CLI_VERSION=${1:-8.4}
 
 # Install SQLite 3.x for Drupal 11 testing if CLI version >= 8.3
 INSTALL_SQLITE=false