diff --git a/Gruntfile.js b/Gruntfile.js
index 153eea59b9..8caace89bf 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -304,11 +304,11 @@ module.exports = function (grunt) {
     });
 
     grunt.registerTask("composer", function() {
-        cp.execSync("composer install --ignore-platform-reqs --no-dev", {stdio: 'ignore'});
+        cp.execSync("php composer.phar install --no-dev", {stdio: 'ignore'});
     });
 
     grunt.registerTask("composer-dev", function() {
-        cp.execSync("composer install --ignore-platform-reqs", {stdio: 'ignore'});
+        cp.execSync("php composer.phar install", {stdio: 'ignore'});
     });
 
     grunt.registerTask("upgrade", function() {
diff --git a/composer.json b/composer.json
index 39a8ba5e76..f583f9d014 100644
--- a/composer.json
+++ b/composer.json
@@ -55,5 +55,9 @@
             "type": "git",
             "url": "https://github.com/yurikuzn/lightncandy.git"
         }
-    ]
+    ],
+    "provide": {
+        "ext-ldap": "*",
+        "ext-zmq": "*"
+    }
 }