diff --git a/composer.json b/composer.json
index 33d5173..f9ac32e 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
   ],
   "require": {
     "php": "^8.2",
-    "a9f/fractor": "^0.3",
+    "a9f/fractor": "^0.3 || ^0.4",
     "rector/rector": "^1.0",
     "symfony/config": "^6.4 || ^7.0",
     "symfony/console": "^6.4 || ^7.0",
diff --git a/res/run_fractor.php b/res/run_fractor.php
index e05981a..3950f1a 100644
--- a/res/run_fractor.php
+++ b/res/run_fractor.php
@@ -14,9 +14,7 @@
     if (!is_string($fractorConfigFile)) {
         throw new \RuntimeException('No file passed in env variable FRACTOR_CONFIG_FILE', 1712507292);
     }
-    $fractorConfigClosure = (require $fractorConfigFile);
-    Assert::isCallable($fractorConfigClosure, 'FRACTOR_CONFIG_FILE did not yield a callable');
-    $fractorConfigClosure($fractorConfig);
+    $fractorConfig->import($fractorConfigFile);
 
     $lifterConfigFile = getenv('LIFTER_CONFIG_FILE');
     if (!is_string($lifterConfigFile)) {