diff --git a/composer.json b/composer.json
index ce22987bef37e52ba0b40dcbf4fdbfb8e98b9e1a..a06f7cbb63beb6803251044d2c7d560cda62d0a2 100644
--- a/composer.json
+++ b/composer.json
@@ -3,6 +3,7 @@
     "description": "Module Ldap des applications Unicaen",
     "require": {
         "php": ">=7.3",
+        "ext-mcrypt": "*",
         "laminas/laminas-config": "^3.2",
         "laminas/laminas-i18n": "^2.9",
         "laminas/laminas-ldap": "^2.10",