diff --git a/README.md b/README.md
index e8ac716..24e3693 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,8 @@
-
 <!-- markdownlint-disable -->
-# terraform-aws-elasticache-redis [![Latest Release](https://img.shields.io/github/release/cloudposse/terraform-aws-elasticache-redis.svg)](https://github.com/cloudposse/terraform-aws-elasticache-redis/releases/latest) [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
+# terraform-aws-elasticache-redis <a href="https://cpco.io/homepage?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content="><img align="right" src="https://cloudposse.com/logo-300x69.svg" width="150" /></a>
+<a href="https://github.com/cloudposse/terraform-aws-elasticache-redis/releases/latest"><img src="https://img.shields.io/github/release/cloudposse/terraform-aws-elasticache-redis.svg" alt="Latest Release"/></a><a href="https://slack.cloudposse.com"><img src="https://slack.cloudposse.com/badge.svg" alt="Slack Community"/></a>
 <!-- markdownlint-restore -->
 
-[![README Header][readme_header_img]][readme_header_link]
-
-[![Cloud Posse][logo]](https://cpco.io/homepage)
-
 <!--
 
 
@@ -14,7 +10,7 @@
 
   ** DO NOT EDIT THIS FILE
   **
-  ** This file was automatically generated by the `build-harness`.
+  ** This file was automatically generated by the `cloudposse/build-harness`.
   ** 1) Make all changes to `README.yaml`
   ** 2) Run `make init` (you only need to do this once)
   ** 3) Run`make readme` to rebuild this file.
@@ -30,24 +26,26 @@
 
 Terraform module to provision an [`ElastiCache`](https://aws.amazon.com/elasticache/) Redis Cluster
 
----
-
-This project is part of our comprehensive ["SweetOps"](https://cpco.io/sweetops) approach towards DevOps.
-<a href="https://cpco.io/terraform-modules"><img src="https://docs.cloudposse.com/images/terraform-open-source-modules.svg" align="right" /></a>
-
-
-It's 100% Open Source and licensed under the [APACHE2](LICENSE).
-
-
-
-
-
-
-
-We literally have [*hundreds of terraform modules*][terraform_modules] that are Open Source and well-maintained. Check them out!
-
 
+---
+> [!NOTE]
+> This project is part of Cloud Posse's comprehensive ["SweetOps"](https://cpco.io/homepage?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=) approach towards DevOps.
+> <details><summary><strong>Learn More</strong></summary>
+> <a href="https://cpco.io/terraform-modules?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=terraform_modules">
+>   <picture>
+>     <source media="(prefers-color-scheme: dark)" srcset="https://docs.cloudposse.com/images/terraform-open-source-modules-light.svg">
+>     <source media="(prefers-color-scheme: light)" srcset="https://docs.cloudposse.com/images/terraform-open-source-modules-dark.svg">
+>     <img alt="Terraform Open Source Modules" src="https://docs.cloudposse.com/images/terraform-open-source-modules.svg" align="right">
+>   </picture>
+> </a>
+>
+>
+> It's 100% Open Source and licensed under the [APACHE2](LICENSE).
+>
+> We literally have [*hundreds of terraform modules*](https://cpco.io/terraform-modules?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=terraform_modules) that are Open Source and well-maintained. Check them out!
+> </details>
 
+<a href="https://cloudposse.com/readme/header/link?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=readme_header_link"><img src="https://cloudposse.com/readme/header/img"/></a>
 
 
 
@@ -56,12 +54,11 @@ We literally have [*hundreds of terraform modules*][terraform_modules] that are
 
 
 
-> **Important**
-> We do not pin modules to versions in our examples because of the
-> difficulty of keeping the versions in the documentation in sync with the latest released versions.
-> We highly recommend that in your code you pin the version to the exact version you are
-> using so that your infrastructure remains stable, and update versions in a
-> systematic way so that they do not catch you by surprise.
+> [!IMPORTANT]
+> In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation 
+> and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version
+> you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic 
+> approach for updating versions to avoid unexpected changes.
 
 
 
@@ -324,7 +321,7 @@ Check out these related projects.
 
 ## ✨ Contributing
 
-This project is under active development, and we encourage contributions from our community. 
+This project is under active development, and we encourage contributions from our community.
 Many thanks to our outstanding contributors:
 
 <a href="https://github.com/cloudposse/terraform-aws-elasticache-redis/graphs/contributors">
@@ -337,45 +334,53 @@ Please use the [issue tracker](https://github.com/cloudposse/terraform-aws-elast
 
 ### 💻 Developing
 
-If you are interested in being a contributor and want to get involved in developing this project or [help out](https://cpco.io/help-out) with our other projects, we would love to hear from you! Shoot us an [email][email].
+If you are interested in being a contributor and want to get involved in developing this project or help out with Cloud Posse's other projects, we would love to hear from you! 
+Hit us up in [Slack](https://cpco.io/slack?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=slack), in the `#cloudposse` channel.
 
 In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
-
- 1. **Fork** the repo on GitHub
- 2. **Clone** the project to your own machine
- 3. **Commit** changes to your own branch
- 4. **Push** your work back up to your fork
- 5. Submit a **Pull Request** so that we can review your changes
+ 1. Review our [Code of Conduct](https://github.com/cloudposse/terraform-aws-elasticache-redis/?tab=coc-ov-file#code-of-conduct) and [Contributor Guidelines](https://github.com/cloudposse/.github/blob/main/CONTRIBUTING.md).
+ 2. **Fork** the repo on GitHub
+ 3. **Clone** the project to your own machine
+ 4. **Commit** changes to your own branch
+ 5. **Push** your work back up to your fork
+ 6. Submit a **Pull Request** so that we can review your changes
 
 **NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!
 
 ### 🌎 Slack Community
 
-Join our [Open Source Community][slack] on Slack. It's **FREE** for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally *sweet* infrastructure.
+Join our [Open Source Community](https://cpco.io/slack?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=slack) on Slack. It's **FREE** for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally *sweet* infrastructure.
 
 ### 📰 Newsletter
 
-Sign up for [our newsletter][newsletter] that covers everything on our technology radar.  Receive updates on what we're up to on GitHub as well as awesome new projects we discover.
+Sign up for [our newsletter](https://cpco.io/newsletter?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=newsletter) and join 3,000+ DevOps engineers, CTOs, and founders who get insider access to the latest DevOps trends, so you can always stay in the know.
+Dropped straight into your Inbox every week — and usually a 5-minute read.
+
+### 📆 Office Hours <a href="https://cloudposse.com/office-hours?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=office_hours"><img src="https://img.cloudposse.com/fit-in/200x200/https://cloudposse.com/wp-content/uploads/2019/08/Powered-by-Zoom.png" align="right" /></a>
 
-### 📆 Office Hours <img src="https://img.cloudposse.com/fit-in/200x200/https://cloudposse.com/wp-content/uploads/2019/08/Powered-by-Zoom.png" align="right" />
+[Join us every Wednesday via Zoom](https://cloudposse.com/office-hours?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=office_hours) for your weekly dose of insider DevOps trends, AWS news and Terraform insights, all sourced from our SweetOps community, plus a _live Q&A_ that you can’t find anywhere else.
+It's **FREE** for everyone!
 
-[Join us every Wednesday via Zoom][office_hours] for our weekly "Lunch & Learn" sessions. It's **FREE** for everyone!
+## About
 
-## About 
+This project is maintained by <a href="https://cpco.io/homepage?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=">Cloud Posse, LLC</a>.
+<a href="https://cpco.io/homepage?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content="><img src="https://cloudposse.com/logo-300x69.svg" align="right" /></a>
 
-This project is maintained and funded by [Cloud Posse, LLC][website]. 
-<a href="https://cpco.io/homepage"><img src="https://cloudposse.com/logo-300x69.svg" align="right" /></a>
+We are a [**DevOps Accelerator**](https://cpco.io/commercial-support?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=commercial_support) for funded startups and enterprises.
+Use our ready-to-go terraform architecture blueprints for AWS to get up and running quickly.
+We build it with you. You own everything. Your team wins. Plus, we stick around until you succeed.
 
-We are a [**DevOps Accelerator**][commercial_support]. We'll help you build your cloud infrastructure from the ground up so you can own it. Then we'll show you how to operate it and stick around for as long as you need us.
+<a href="https://cpco.io/commercial-support?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=commercial_support"><img alt="Learn More" src="https://img.shields.io/badge/learn%20more-success.svg?style=for-the-badge"/></a>
 
-[![Learn More](https://img.shields.io/badge/learn%20more-success.svg?style=for-the-badge)][commercial_support]
+*Your team can operate like a pro today.*
 
-Work directly with our team of DevOps experts via email, slack, and video conferencing.
+Ensure that your team succeeds by using our proven process and turnkey blueprints. Plus, we stick around until you succeed.
 
-We deliver 10x the value for a fraction of the cost of a full-time engineer. Our track record is not even funny. If you want things done right and you need it done FAST, then we're your best bet.
+<details>
+  <summary>📚 <strong>See What's Included</strong></summary>
 
 - **Reference Architecture.** You'll get everything you need from the ground up built using 100% infrastructure as code.
-- **Release Engineering.** You'll have end-to-end CI/CD with unlimited staging environments.
+- **Deployment Strategy.** You'll have a battle-tested deployment strategy using GitHub Actions that's automated and repeatable.
 - **Site Reliability Engineering.** You'll have total visibility into your apps and microservices.
 - **Security Baseline.** You'll have built-in governance with accountability and audit logs for all changes.
 - **GitOps.** You'll be able to operate your infrastructure via Pull Requests.
@@ -384,13 +389,19 @@ We deliver 10x the value for a fraction of the cost of a full-time engineer. Our
 - **Troubleshooting.** You'll get help to triage when things aren't working.
 - **Code Reviews.** You'll receive constructive feedback on Pull Requests.
 - **Bug Fixes.** We'll rapidly work with you to fix any bugs in our projects.
+</details>
 
-[![README Commercial Support][readme_commercial_support_img]][readme_commercial_support_link]
+<a href="https://cloudposse.com/readme/commercial-support/link?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=readme_commercial_support_link"><img src="https://cloudposse.com/readme/commercial-support/img"/></a>
 ## License
 
-[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+<a href="https://opensource.org/licenses/Apache-2.0"><img src="https://img.shields.io/badge/License-Apache%202.0-blue.svg?style=for-the-badge" alt="License"></a>
 
-See [LICENSE](LICENSE) for full details.
+<details>
+<summary>Preamble to the Apache License, Version 2.0</summary>
+<br/>
+<br/>
+
+Complete license is available in the [`LICENSE`](LICENSE) file.
 
 ```text
 Licensed to the Apache Software Foundation (ASF) under one
@@ -410,34 +421,15 @@ KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
 ```
+</details>
 
 ## Trademarks
 
 All other trademarks referenced herein are the property of their respective owners.
 ---
-Copyright © 2017-2023 [Cloud Posse, LLC](https://cpco.io/copyright)
-[![README Footer][readme_footer_img]][readme_footer_link]
-[![Beacon][beacon]][website]
-<!-- markdownlint-disable -->
-  [logo]: https://cloudposse.com/logo-300x69.svg
-  [docs]: https://cpco.io/docs?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=docs
-  [website]: https://cpco.io/homepage?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=website
-  [github]: https://cpco.io/github?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=github
-  [jobs]: https://cpco.io/jobs?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=jobs
-  [hire]: https://cpco.io/hire?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=hire
-  [slack]: https://cpco.io/slack?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=slack
-  [twitter]: https://cpco.io/twitter?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=twitter
-  [office_hours]: https://cloudposse.com/office-hours?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=office_hours
-  [newsletter]: https://cpco.io/newsletter?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=newsletter
-  [email]: https://cpco.io/email?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=email
-  [commercial_support]: https://cpco.io/commercial-support?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=commercial_support
-  [we_love_open_source]: https://cpco.io/we-love-open-source?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=we_love_open_source
-  [terraform_modules]: https://cpco.io/terraform-modules?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=terraform_modules
-  [readme_header_img]: https://cloudposse.com/readme/header/img
-  [readme_header_link]: https://cloudposse.com/readme/header/link?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=readme_header_link
-  [readme_footer_img]: https://cloudposse.com/readme/footer/img
-  [readme_footer_link]: https://cloudposse.com/readme/footer/link?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=readme_footer_link
-  [readme_commercial_support_img]: https://cloudposse.com/readme/commercial-support/img
-  [readme_commercial_support_link]: https://cloudposse.com/readme/commercial-support/link?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=readme_commercial_support_link
-  [beacon]: https://ga-beacon.cloudposse.com/UA-76589703-4/cloudposse/terraform-aws-elasticache-redis?pixel&cs=github&cm=readme&an=terraform-aws-elasticache-redis
-<!-- markdownlint-restore -->
+Copyright © 2017-2024 [Cloud Posse, LLC](https://cpco.io/copyright)
+
+
+<a href="https://cloudposse.com/readme/footer/link?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=readme_footer_link"><img alt="README footer" src="https://cloudposse.com/readme/footer/img"/></a>
+
+<img alt="Beacon" width="0" src="https://ga-beacon.cloudposse.com/UA-76589703-4/cloudposse/terraform-aws-elasticache-redis?pixel&cs=github&cm=readme&an=terraform-aws-elasticache-redis"/>
diff --git a/main.tf b/main.tf
index 77d1fbd..c003993 100644
--- a/main.tf
+++ b/main.tf
@@ -154,7 +154,7 @@ resource "aws_elasticache_replication_group" "default" {
   notification_topic_arn     = var.notification_topic_arn
   engine_version             = var.engine_version
   at_rest_encryption_enabled = var.at_rest_encryption_enabled
-  transit_encryption_enabled = var.transit_encryption_enabled || var.auth_token != null
+  transit_encryption_enabled = var.transit_encryption_enabled
   kms_key_id                 = var.at_rest_encryption_enabled ? var.kms_key_id : null
   snapshot_name              = var.snapshot_name
   snapshot_arns              = var.snapshot_arns