diff --git a/composer.json b/composer.json
index 9140e7c..4c25deb 100644
--- a/composer.json
+++ b/composer.json
@@ -17,6 +17,7 @@
         "ext-zip": "*",
         "ext-openssl": "*",
         "ext-reflection": "*",
+        "ext-redis": "*",
         "phpunit/phpunit": "^8.2",
         "phpunit/phpcov": "^6.0",
         "php-coveralls/php-coveralls": "^2.1",