diff --git a/app/Util/MigrationHelper.php b/app/Util/MigrationHelper.php
index 5b56a57..eddfa40 100644
--- a/app/Util/MigrationHelper.php
+++ b/app/Util/MigrationHelper.php
@@ -72,8 +72,8 @@ class MigrationHelper
         } else {
             $this->table->uuid('id')->primary()->comment("ID");
         }
-        $this->table->unsignedBigInteger(ColumnName::CREATED_BY)->nullable()->comment("作成者ID");
-        $this->table->unsignedBigInteger(ColumnName::UPDATED_BY)->nullable()->comment("更新者ID");
+        $this->table->uuid(ColumnName::CREATED_BY)->nullable()->comment("作成者ID");
+        $this->table->uuid(ColumnName::UPDATED_BY)->nullable()->comment("更新者ID");
         $this->table->timestamp(ColumnName::CREATED_AT)->nullable()->comment("作成日時");
         $this->table->timestamp(ColumnName::UPDATED_AT)->nullable()->comment("更新日時");
         $this->table->timestamp(ColumnName::DELETED_AT)->nullable()->comment("論理削除日時");