diff --git a/src/wp-includes/option.php b/src/wp-includes/option.php
index 866cbcc480..3e29c578f0 100644
--- a/src/wp-includes/option.php
+++ b/src/wp-includes/option.php
@@ -1781,7 +1781,7 @@ function register_initial_settings() {
 
 	register_setting( 'general', 'start_of_week', array(
 		'show_in_rest' => true,
-		'type'         => 'number',
+		'type'         => 'integer',
 		'description'  => __( 'A day number of the week that the week should start on.' ),
 	) );
 
@@ -1803,7 +1803,7 @@ function register_initial_settings() {
 
 	register_setting( 'writing', 'default_category', array(
 		'show_in_rest' => true,
-		'type'         => 'number',
+		'type'         => 'integer',
 		'description'  => __( 'Default category.' ),
 	) );
 
@@ -1815,7 +1815,7 @@ function register_initial_settings() {
 
 	register_setting( 'reading', 'posts_per_page', array(
 		'show_in_rest' => true,
-		'type'         => 'number',
+		'type'         => 'integer',
 		'description'  => __( 'Blog pages show at most.' ),
 		'default'      => 10,
 	) );
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-settings-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-settings-controller.php
index 0f1ead65f2..5d16fb396e 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-settings-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-settings-controller.php
@@ -132,6 +132,8 @@ class WP_REST_Settings_Controller extends WP_REST_Controller {
 		switch ( $schema['type'] ) {
 			case 'string':
 				return (string) $value;
+			case 'integer':
+				return (int) $value;
 			case 'number':
 				return (float) $value;
 			case 'boolean':
@@ -258,7 +260,7 @@ class WP_REST_Settings_Controller extends WP_REST_Controller {
 			 * Whitelist the supported types for settings, as we don't want invalid types
 			 * to be updated with arbitrary values that we can't do decent sanitizing for.
 			 */
-			if ( ! in_array( $rest_args['schema']['type'], array( 'number', 'string', 'boolean' ), true ) ) {
+			if ( ! in_array( $rest_args['schema']['type'], array( 'number', 'integer', 'string', 'boolean' ), true ) ) {
 				continue;
 			}
 
diff --git a/src/wp-includes/rest-api/fields/class-wp-rest-meta-fields.php b/src/wp-includes/rest-api/fields/class-wp-rest-meta-fields.php
index a85424e467..2c765caeaa 100644
--- a/src/wp-includes/rest-api/fields/class-wp-rest-meta-fields.php
+++ b/src/wp-includes/rest-api/fields/class-wp-rest-meta-fields.php
@@ -404,6 +404,9 @@ abstract class WP_REST_Meta_Fields {
 			case 'string':
 				$value = (string) $value;
 				break;
+			case 'integer':
+				$value = (int) $value;
+				break;
 			case 'number':
 				$value = (float) $value;
 				break;
diff --git a/tests/phpunit/tests/rest-api/rest-settings-controller.php b/tests/phpunit/tests/rest-api/rest-settings-controller.php
index 11a20ee5af..ff91a60471 100644
--- a/tests/phpunit/tests/rest-api/rest-settings-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-settings-controller.php
@@ -267,6 +267,22 @@ class WP_Test_REST_Settings_Controller extends WP_Test_REST_Controller_Testcase
 		$this->assertErrorResponse( 'rest_invalid_param', $response, 400 );
 	}
 
+	public function test_update_item_with_integer() {
+		wp_set_current_user( self::$administrator );
+		$request = new WP_REST_Request( 'PUT', '/wp/v2/settings' );
+		$request->set_param( 'posts_per_page', 11 );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 200, $response->get_status() );
+	}
+
+	public function test_update_item_with_invalid_float_for_integer() {
+		wp_set_current_user( self::$administrator );
+		$request = new WP_REST_Request( 'PUT', '/wp/v2/settings' );
+		$request->set_param( 'posts_per_page', 10.5 );
+		$response = $this->server->dispatch( $request );
+		$this->assertErrorResponse( 'rest_invalid_param', $response, 400 );
+	}
+
 	/**
 	 * Setting an item to "null" will essentially restore it to it's default value.
 	 */