diff --git a/composer.json b/composer.json
index d4d88aa..1bf875f 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
         "drupal/lagoon_varnish": "1.x-dev",
         "drupal/purge": "3.6.0",
         "drupal/varnish_purge": "2.2.0",
-        "drush/drush": "11.6.0",
+        "drush/drush": "13.1.1",
         "zaporylie/composer-drupal-optimizations": "1.2.0"
     },
     "require-dev": {