diff --git a/composer.json b/composer.json
index e975e178..735d388c 100644
--- a/composer.json
+++ b/composer.json
@@ -28,6 +28,7 @@
     ],
     "require": {
         "php": "^7.2 || ^8.0",
+        "ext-filter": "*",
         "ext-json": "*",
         "marc-mabe/php-enum":"^4.4"
     },