I forgot to include composer.json & composer.lock

composer.json

@@ -184,7 +184,7 @@
         "drupal/webform": "5.0-rc12",
         "drupal/webform_views": "5.0-alpha2",
         "drush-ops/behat-drush-endpoint": "^0.0.5",
-        "drush/drush": "~8",
+        "drush/drush": "^8.2.3",
         "enyo/dropzone": "^5.1",
         "gdsmith/jquery.easing": "1.4.1",
         "oomphinc/composer-installers-extender": "^1.1",