diff --git a/assets/migrations/2019_09_15_000020_create_domains_table.php b/assets/migrations/2019_09_15_000020_create_domains_table.php
index 17f706c2..d2884f29 100644
--- a/assets/migrations/2019_09_15_000020_create_domains_table.php
+++ b/assets/migrations/2019_09_15_000020_create_domains_table.php
@@ -21,7 +21,7 @@ class CreateDomainsTable extends Migration
             $table->string('tenant_id');
 
             $table->timestamps();
-            $table->foreign('tenant_id')->references('id')->on('tenants')->onUpdate('cascade');
+            $table->foreign('tenant_id')->references('id')->on('tenants')->onUpdate('cascade')->onDelete('set null');;
         });
     }