diff --git a/composer.json b/composer.json
index 483713e..b100508 100644
--- a/composer.json
+++ b/composer.json
@@ -45,7 +45,7 @@
         "webmozart/path-util": "^2.3"
     },
     "require-dev": {
-        "webflo/drupal-core-require-dev": "~8.4"
+        "webflo/drupal-core-require-dev": "~8.5"
     },
     "conflict": {
         "drupal/drupal": "*"