diff --git a/composer.json b/composer.json
index 665c66a..c2d314c 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,8 @@
     ],
     "require" : {
         "zendframework/zend-authentication":"2.*",
-        "zendframework/zend-ldap" : "2.*"
+        "zendframework/zend-ldap" : "2.*",
+        "ext-ldap" : "*"
     },
     "require-dev" : {
         "phpunit/phpunit": "4.1.*",