diff --git a/composer.json b/composer.json
index 18a4593..4b09770 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,8 @@
         "files": [ "command.php" ]
     },
     "require": {
-        "php": ">=5.4"
+        "php": ">=5.4",
+        "wp-cli/wp-cli": "*"
     },
     "require-dev": {
         "behat/behat": "~2.5"