diff --git a/README.md b/README.md
index 40df3d9..cbe828d 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 **Tags:** cache, plugin, redis
 **Requires at least:** 3.0.1
 **Tested up to:** 6.2
-**Stable tag:** 1.4.0-dev
+**Stable tag:** 1.4.0
 **License:** GPLv2 or later
 **License URI:** http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -104,8 +104,10 @@ There's a known issue with WordPress `alloptions` cache design. Specifically, a
 
 ## Changelog ##
 
-### Latest ###
+### 1.4.0 (May 9, 2023) ###
 * Add support for `flush_runtime` and `flush_group` functions [[#405](https://github.com/pantheon-systems/wp-redis/pull/405)]
+* Add `pantheon-wp-coding-standards` [[#400](https://github.com/pantheon-systems/wp-redis/pull/400)]
+* Update CONTRIBUTING.MD [[#406](https://github.com/pantheon-systems/wp-redis/pull/406)]
 * Update Composer dependencies [[#401](https://github.com/pantheon-systems/wp-redis/pull/394)]
 
 ### 1.3.5 (April 6, 2023) ###
@@ -115,7 +117,6 @@ There's a known issue with WordPress `alloptions` cache design. Specifically, a
 ### 1.3.4 (March 7, 2023) ###
 * Set `missing_redis_message` if Redis service is not connected [[#391](https://github.com/pantheon-systems/wp-redis/pull/391)]
 
-
 ### 1.3.3 (February 28, 2023) ###
 * Add PHP 8.2 support [[#388](https://github.com/pantheon-systems/wp-redis/pull/388)]
 * Remove Grunt, add valid license to Composer file [[#387](https://github.com/pantheon-systems/wp-redis/pull/387)]
@@ -127,8 +128,7 @@ There's a known issue with WordPress `alloptions` cache design. Specifically, a
 ### 1.3.1 (December 2, 2022) ###
 * Declare `wp_cache_supports` function and support features. [[#378](https://github.com/pantheon-systems/wp-redis/pull/378)]
 * Make dependabot target `develop` branch for PRs. [[#376](https://github.com/pantheon-systems/wp-redis/pull/376)]
-
-Declare `wp_cache_supports` function and support features. [[#378](https://github.com/pantheon-systems/wp-redis/pull/378)]
+* Declare `wp_cache_supports` function and support features. [[#378](https://github.com/pantheon-systems/wp-redis/pull/378)]
 
 ### 1.3.0 (November 29, 2022) ###
 * Added CONTRIBUTING.MD and GitHub action to automate deployments to wp.org. [[#368](https://github.com/pantheon-systems/wp-redis/pull/368)]
@@ -231,5 +231,7 @@ Declare `wp_cache_supports` function and support features. [[#378](https://githu
 ### 0.1 ###
 * Initial commit of working code for the benefit of all.
 
-## Latest ##
-WP Redis 1.4.0-dev adds support for the `flush_runtime` and `flush_group` functions. If you've copied `object-cache.php` and made your own changes, be sure to copy these additions over as well.
+## Upgrade Notice ##
+
+### 1.4.0 (May 9, 2023) ###
+WP Redis 1.4.0 adds support for the `flush_runtime` and `flush_group` functions. If you've copied `object-cache.php` and made your own changes, be sure to copy these additions over as well.
diff --git a/readme.txt b/readme.txt
index 552219b..b467d1d 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: getpantheon, danielbachhuber, mboynes, Outlandish Josh, jspellman,
 Tags: cache, plugin, redis
 Requires at least: 3.0.1
 Tested up to: 6.2
-Stable tag: 1.4.0-dev
+Stable tag: 1.4.0
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -102,8 +102,10 @@ There's a known issue with WordPress `alloptions` cache design. Specifically, a
 
 == Changelog ==
 
-= Latest =
+= 1.4.0 (May 9, 2023) =
 * Add support for `flush_runtime` and `flush_group` functions [[#405](https://github.com/pantheon-systems/wp-redis/pull/405)]
+* Add `pantheon-wp-coding-standards` [[#400](https://github.com/pantheon-systems/wp-redis/pull/400)]
+* Update CONTRIBUTING.MD [[#406](https://github.com/pantheon-systems/wp-redis/pull/406)]
 * Update Composer dependencies [[#401](https://github.com/pantheon-systems/wp-redis/pull/394)]
 
 = 1.3.5 (April 6, 2023) =
@@ -228,5 +230,5 @@ There's a known issue with WordPress `alloptions` cache design. Specifically, a
 
 == Upgrade Notice ==
 
-= Latest =
-WP Redis 1.4.0-dev adds support for the `flush_runtime` and `flush_group` functions. If you've copied `object-cache.php` and made your own changes, be sure to copy these additions over as well.
\ No newline at end of file
+= 1.4.0 =
+WP Redis 1.4.0 adds support for the `flush_runtime` and `flush_group` functions. If you've copied `object-cache.php` and made your own changes, be sure to copy these additions over as well.
\ No newline at end of file
diff --git a/wp-redis.php b/wp-redis.php
index ae9dd48..c58ec99 100644
--- a/wp-redis.php
+++ b/wp-redis.php
@@ -3,7 +3,7 @@
  * Plugin Name: WP Redis
  * Plugin URI: http://github.com/pantheon-systems/wp-redis/
  * Description: WordPress Object Cache using Redis. Requires the PhpRedis extension (https://github.com/phpredis/phpredis).
- * Version: 1.4.0-dev
+ * Version: 1.4.0
  * Author: Pantheon, Josh Koenig, Matthew Boynes, Daniel Bachhuber, Alley Interactive
  * Author URI: https://pantheon.io/
  */