diff --git a/db/migrate/20221123023450_update_user_nick_name.rb b/db/migrate/20221123023450_update_user_nick_name.rb
new file mode 100644
index 000000000..0910b7397
--- /dev/null
+++ b/db/migrate/20221123023450_update_user_nick_name.rb
@@ -0,0 +1,21 @@
+class UpdateUserNickName < ActiveRecord::Migration[5.2]
+  def change
+    execute("ALTER TABLE `users` MODIFY `nickname` VARCHAR(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+    execute("ALTER TABLE `open_users` MODIFY `extra` text CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+
+    execute("ALTER TABLE `issues` MODIFY `subject` VARCHAR(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+    execute("ALTER TABLE `issues` MODIFY `description` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+
+    execute("ALTER TABLE `projects` MODIFY `description` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+    execute("ALTER TABLE `project_details` MODIFY `content` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+
+    execute("ALTER TABLE `journals` MODIFY `notes` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+    execute("ALTER TABLE `journal_details` MODIFY `old_value` text CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+    execute("ALTER TABLE `journal_details` MODIFY `value` text CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+
+    execute("ALTER TABLE `claims` MODIFY `note` text CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+
+    execute("ALTER TABLE `commit_logs` MODIFY `message` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;")
+
+  end
+end