diff --git a/database/migrations/2019_04_24_000001_create_contracts_table.php b/database/migrations/2019_04_24_000001_create_contracts_table.php
index d4373e2b7..7dbfadfde 100644
--- a/database/migrations/2019_04_24_000001_create_contracts_table.php
+++ b/database/migrations/2019_04_24_000001_create_contracts_table.php
@@ -21,7 +21,7 @@ class CreateContractsTable extends Migration
                 $table->date('end_date');
                 $table->text('body');
                 $table->boolean('finished')->default(false);
-                $table->decimal('final_cost');
+                $table->decimal('final_cost')->nullable();
                 $table->timestamps();
             });
         }