diff --git a/.gitignore b/.gitignore
index ab48230..092d990 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,4 @@ build
 
 /vendor/
 *.tsbuildinfo
+.phpunit.result.cache
diff --git a/README.md b/README.md
index 0f78952..e541208 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,7 @@ Yes, scheduling can be enabled for any taxonomy that is shown in the admin UI (`
 ### Unreleased
 * Tested WordPress 7.0.
 * Drop support for PHP 8.1.
+* Renamed the internal PHP namespace from `HAMWORKS\WP\Schedule_Terms` to `Torounit\WP\Schedule_Terms` (old class names are aliased for backward compatibility and will be removed in a future major release).
 
 ### 1.3.0
 * Tested WordPress 6.5.
diff --git a/composer.json b/composer.json
index d3a4451..323b9e7 100644
--- a/composer.json
+++ b/composer.json
@@ -20,9 +20,12 @@
 	},
 	"autoload": {
 		"psr-4": {
-			"HAMWORKS\\WP\\Schedule_Terms\\": "./includes",
-			"HAMWORKS\\WP\\Schedule_Terms\\Tests\\": "./tests/php"
-		}
+			"Torounit\\WP\\Schedule_Terms\\": "./includes",
+			"Torounit\\WP\\Schedule_Terms\\Tests\\": "./tests/php"
+		},
+		"files": [
+			"includes/compat.php"
+		]
 	},
 	"scripts": {
 		"test": "phpunit",
diff --git a/composer.lock b/composer.lock
index ccc1868..3be69b3 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "57fba4be398498a345a461dd3bc160da",
+    "content-hash": "dc78ce983c4e4bfd0b5e3e751834e971",
     "packages": [],
     "packages-dev": [
         {
diff --git a/includes/Assets.php b/includes/Assets.php
index ae7e428..1d5e576 100644
--- a/includes/Assets.php
+++ b/includes/Assets.php
@@ -5,7 +5,7 @@
  * @package Schedule_Terms
  */
 
-namespace HAMWORKS\WP\Schedule_Terms;
+namespace Torounit\WP\Schedule_Terms;
 
 /**
  * Class used to register style and js.
diff --git a/includes/Plugin.php b/includes/Plugin.php
index 0fc6b1d..cbcea88 100644
--- a/includes/Plugin.php
+++ b/includes/Plugin.php
@@ -5,7 +5,7 @@
  * @package Schedule_Terms
  */
 
-namespace HAMWORKS\WP\Schedule_Terms;
+namespace Torounit\WP\Schedule_Terms;
 
 /**
  * Plugin base class.
diff --git a/includes/Post_Meta.php b/includes/Post_Meta.php
index 28631e7..be5465a 100644
--- a/includes/Post_Meta.php
+++ b/includes/Post_Meta.php
@@ -5,7 +5,7 @@
  * @package Schedule_Terms
  */
 
-namespace HAMWORKS\WP\Schedule_Terms;
+namespace Torounit\WP\Schedule_Terms;
 
 /**
  * Register post meta.
diff --git a/includes/Schedule.php b/includes/Schedule.php
index bdb4e5a..1e40cd4 100644
--- a/includes/Schedule.php
+++ b/includes/Schedule.php
@@ -5,7 +5,7 @@
  * @package Schedule_Terms
  */
 
-namespace HAMWORKS\WP\Schedule_Terms;
+namespace Torounit\WP\Schedule_Terms;
 
 use WP_Term;
 
diff --git a/includes/Term/UI.php b/includes/Term/UI.php
index aa15a1a..af63442 100644
--- a/includes/Term/UI.php
+++ b/includes/Term/UI.php
@@ -6,7 +6,7 @@
  * @see https://github.com/JJJ/wp-term-meta-ui/blob/master/class-wp-term-meta-ui.php
  */
 
-namespace HAMWORKS\WP\Schedule_Terms\Term;
+namespace Torounit\WP\Schedule_Terms\Term;
 
 use WP_Taxonomy;
 use WP_Term;
diff --git a/includes/Term_Manager.php b/includes/Term_Manager.php
index 1563e53..e490a61 100644
--- a/includes/Term_Manager.php
+++ b/includes/Term_Manager.php
@@ -5,7 +5,7 @@
  * @package Schedule_Terms
  */
 
-namespace HAMWORKS\WP\Schedule_Terms;
+namespace Torounit\WP\Schedule_Terms;
 
 use WP_Term;
 
diff --git a/includes/Term_Meta.php b/includes/Term_Meta.php
index 5f0a7d0..65b5102 100644
--- a/includes/Term_Meta.php
+++ b/includes/Term_Meta.php
@@ -5,7 +5,7 @@
  * @package Schedule_Terms
  */
 
-namespace HAMWORKS\WP\Schedule_Terms;
+namespace Torounit\WP\Schedule_Terms;
 
 /**
  *  Term Meta class.
diff --git a/includes/Term_UI.php b/includes/Term_UI.php
index 6dc4593..2ef7655 100644
--- a/includes/Term_UI.php
+++ b/includes/Term_UI.php
@@ -5,9 +5,9 @@
  * @package Schedule_Terms
  */
 
-namespace HAMWORKS\WP\Schedule_Terms;
+namespace Torounit\WP\Schedule_Terms;
 
-use HAMWORKS\WP\Schedule_Terms\Term\UI;
+use Torounit\WP\Schedule_Terms\Term\UI;
 
 /**
  * Term meta UI controller.
diff --git a/includes/compat.php b/includes/compat.php
new file mode 100644
index 0000000..38ab070
--- /dev/null
+++ b/includes/compat.php
@@ -0,0 +1,29 @@
+<?php
+/**
+ * Backward-compatible class aliases for the deprecated
+ * HAMWORKS\WP\Schedule_Terms namespace.
+ *
+ * TODO: remove this file and the "files" autoload entry in a future
+ * major release once the old namespace is no longer supported.
+ *
+ * @package Schedule_Terms
+ */
+
+( function () {
+	$map = array(
+		'HAMWORKS\\WP\\Schedule_Terms\\Assets'       => 'Torounit\\WP\\Schedule_Terms\\Assets',
+		'HAMWORKS\\WP\\Schedule_Terms\\Plugin'       => 'Torounit\\WP\\Schedule_Terms\\Plugin',
+		'HAMWORKS\\WP\\Schedule_Terms\\Post_Meta'    => 'Torounit\\WP\\Schedule_Terms\\Post_Meta',
+		'HAMWORKS\\WP\\Schedule_Terms\\Schedule'     => 'Torounit\\WP\\Schedule_Terms\\Schedule',
+		'HAMWORKS\\WP\\Schedule_Terms\\Term_Manager' => 'Torounit\\WP\\Schedule_Terms\\Term_Manager',
+		'HAMWORKS\\WP\\Schedule_Terms\\Term_Meta'    => 'Torounit\\WP\\Schedule_Terms\\Term_Meta',
+		'HAMWORKS\\WP\\Schedule_Terms\\Term_UI'      => 'Torounit\\WP\\Schedule_Terms\\Term_UI',
+		'HAMWORKS\\WP\\Schedule_Terms\\Term\\UI'     => 'Torounit\\WP\\Schedule_Terms\\Term\\UI',
+	);
+
+	foreach ( $map as $old_class => $new_class ) {
+		if ( ! class_exists( $old_class ) && class_exists( $new_class ) ) {
+			class_alias( $new_class, $old_class );
+		}
+	}
+} )();
diff --git a/schedule-terms.php b/schedule-terms.php
index e3474b7..1a7b5b0 100644
--- a/schedule-terms.php
+++ b/schedule-terms.php
@@ -14,7 +14,7 @@
  * @package Schedule_Terms
  */
 
-use HAMWORKS\WP\Schedule_Terms\Plugin;
+use Torounit\WP\Schedule_Terms\Plugin;
 
 require_once __DIR__ . '/vendor/autoload.php';
 
diff --git a/tests/php/Schedule_Test.php b/tests/php/Schedule_Test.php
index a61d6e8..d468bff 100644
--- a/tests/php/Schedule_Test.php
+++ b/tests/php/Schedule_Test.php
@@ -5,9 +5,9 @@
  * @package Schedule_Terms
  */
 
-namespace HAMWORKS\WP\Schedule_Terms\Tests;
+namespace Torounit\WP\Schedule_Terms\Tests;
 
-use HAMWORKS\WP\Schedule_Terms\Schedule;
+use Torounit\WP\Schedule_Terms\Schedule;
 use WP_UnitTestCase;
 
 /**
diff --git a/tests/php/Term_Manager_Test.php b/tests/php/Term_Manager_Test.php
index f742cc2..7daf081 100644
--- a/tests/php/Term_Manager_Test.php
+++ b/tests/php/Term_Manager_Test.php
@@ -5,9 +5,9 @@
  * @package Schedule_Terms
  */
 
-namespace HAMWORKS\WP\Schedule_Terms\Tests;
+namespace Torounit\WP\Schedule_Terms\Tests;
 
-use HAMWORKS\WP\Schedule_Terms\Term_Manager;
+use Torounit\WP\Schedule_Terms\Term_Manager;
 use WP_UnitTestCase;
 
 /**