diff --git a/.github/workflows/REUSABLE_backend.yml b/.github/workflows/REUSABLE_backend.yml
index 0b4a837e38..54c0475a19 100644
--- a/.github/workflows/REUSABLE_backend.yml
+++ b/.github/workflows/REUSABLE_backend.yml
@@ -32,7 +32,7 @@ on:
         type: string
         required: false
         # Keep PHP versions synced with build-install-packages.yml
-        default: '["8.2", "8.3"]'
+        default: '["8.2", "8.3", "8.4"]'
 
       php_extensions:
         description: PHP extensions to install.
diff --git a/.github/workflows/build-install-packages.yml b/.github/workflows/build-install-packages.yml
index 5ecdd320fc..b7dd2928c6 100644
--- a/.github/workflows/build-install-packages.yml
+++ b/.github/workflows/build-install-packages.yml
@@ -6,7 +6,7 @@ on:
 
 env:
   VERSION: ${{ github.event.release.tag_name }}
-  PHP_VERSIONS: '8.2 8.3'
+  PHP_VERSIONS: '8.2 8.3 8.4'
   INSTALL_PACKAGES_INPUTS: '{ "flarum_version": "{0}", "php_versions": "{1}" }'
 
 jobs: