diff --git a/.github/workflows/cypress.yml b/.github/workflows/cypress.yml
index e70ad88..d51df6d 100644
--- a/.github/workflows/cypress.yml
+++ b/.github/workflows/cypress.yml
@@ -19,7 +19,7 @@ jobs:
       matrix:
         core:
           - {name: 'WP latest', version: 'latest'}
-          - {name: 'WP minimum', version: 'WordPress/WordPress#6.3'}
+          - {name: 'WP minimum', version: 'WordPress/WordPress#6.4'}
           - {name: 'WP trunk', version: 'WordPress/WordPress#master'}
     steps:
     - name: Checkout
diff --git a/README.md b/README.md
index 29bfdfb..2716225 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Yes! However, if you are using a subfolder installation it will only work for th
 ## Requirements
 
 * Requires PHP 7.4+.
-* Requires WordPress 6.3+.
+* Requires WordPress 6.4+.
 * Ad blockers may break syntax highlighting and pre-save error checking on the edit screen. See [#20](https://github.com/10up/ads-txt/issues/20).
 * Rewrites need to be enabled. Without rewrites, WordPress cannot know to supply `/ads.txt` when requested.
 * Your site URL must not contain a path (e.g. `https://example.com/site/` or path-based multisite installs). While the plugin will appear to function in the admin, it will not display the contents at `https://example.com/site/ads.txt`. This is because the plugin follows the IAB spec, which requires that the ads.txt file be located at the root of a domain or subdomain.
diff --git a/ads-txt.php b/ads-txt.php
index 08c0451..7432805 100644
--- a/ads-txt.php
+++ b/ads-txt.php
@@ -4,7 +4,7 @@
  * Plugin URI:        https://github.com/10up/ads-txt
  * Description:       Create, manage, and validate your Ads.txt from within WordPress, just like any other content asset. Requires PHP 7.4+ and WordPress 5.7+.
  * Version:           1.4.4
- * Requires at least: 6.3
+ * Requires at least: 6.4
  * Requires PHP:      7.4
  * Author:            10up
  * Author URI:        https://10up.com
diff --git a/readme.txt b/readme.txt
index 28e6da7..10c0ac8 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1,7 +1,7 @@
 === Ads.txt Manager ===
 Contributors:      10up, helen, adamsilverstein, jakemgold, peterwilsoncc, jeffpaul
 Tags:              ads.txt, app-ads.txt, ads, ad manager, advertising
-Tested up to:      6.5
+Tested up to:      6.6
 Stable tag:        1.4.4
 License:           GPL-2.0-or-later
 License URI:       https://spdx.org/licenses/GPL-2.0-or-later.html