diff --git a/src/Illuminate/Database/composer.json b/src/Illuminate/Database/composer.json
index cf735d559f22..fcc4034eee80 100644
--- a/src/Illuminate/Database/composer.json
+++ b/src/Illuminate/Database/composer.json
@@ -34,6 +34,10 @@
             "dev-master": "10.x-dev"
         }
     },
+    "conflict": {
+        "carbonphp/carbon-doctrine-types": ">=3.0",
+        "doctrine/dbal": ">=4.0"
+    },
     "suggest": {
         "ext-filter": "Required to use the Postgres database driver.",
         "doctrine/dbal": "Required to rename columns and drop SQLite columns (^3.5.1).",