diff --git a/.github/workflows/backend.yml b/.github/workflows/backend.yml
index be4f3e5..d7e10ef 100644
--- a/.github/workflows/backend.yml
+++ b/.github/workflows/backend.yml
@@ -8,5 +8,6 @@ jobs:
     with:
       enable_backend_testing: true
       enable_phpstan: true
+      php_versions: '["7.4", "8.0", "8.1", "8.2", "8.3"]'
 
       backend_directory: .
diff --git a/composer.json b/composer.json
index a73a2ac..b85eb51 100644
--- a/composer.json
+++ b/composer.json
@@ -29,6 +29,7 @@
         }
     ],
     "require": {
+        "php": "^7.4 || ^8.0",
         "flarum/core": "^1.2.0",
         "flarum/approval": "*",
         "flarum/flags": "*"