diff --git a/README.md b/README.md
index 8543135..c3673c6 100644
--- a/README.md
+++ b/README.md
@@ -15,14 +15,14 @@ From within your WordPress or Bedrock root directory, run:
 
 To cache stats for a network, run (with [wp-cli](https://wp-cli.org)): `wp eval-file bin/cache.php`. You can set up a cron job for this if you want.
 
-## Changelog 
+## Changelog
 
-### 1.6.3 
+### 1.6.4
 
-* See: https://github.com/pressbooks/pressbooks-stats/releases/tag/1.6.3
+* See: https://github.com/pressbooks/pressbooks-stats/releases/tag/1.6.4
 * Full release history available at: https://github.com/pressbooks/pressbooks-stats/releases
 
-## Upgrade Notice 
+## Upgrade Notice
 
-### 1.6.3 
-* Pressbooks Stats requires Pressbooks >= 5.8.3
\ No newline at end of file
+### 1.6.3
+* Pressbooks Stats requires Pressbooks >= 5.8.3
diff --git a/pressbooks-stats.php b/pressbooks-stats.php
index c24792f..2b69081 100644
--- a/pressbooks-stats.php
+++ b/pressbooks-stats.php
@@ -2,8 +2,8 @@
 /*
 Plugin Name: Pressbooks Stats
 Description: Pressbooks plugin which provides some basic activity statistics for a Pressbooks network.
-Version: 1.6.3
-Pressbooks tested up to: 5.8.3
+Version: 1.6.4
+Pressbooks tested up to: 5.30.0
 Author: Pressbooks (Book Oven Inc.)
 Author URI: https://pressbooks.org
 Network: True