diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php
index 415ba8e9bc..4eced8f8ae 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php
@@ -1141,7 +1141,7 @@ class WP_REST_Comments_Controller extends WP_REST_Controller {
 	 */
 	public function get_item_schema() {
 		$schema = array(
-			'$schema'              => 'http://json-schema.org/schema#',
+			'$schema'              => 'http://json-schema.org/draft-04/schema#',
 			'title'                => 'comment',
 			'type'                 => 'object',
 			'properties'           => array(
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-post-statuses-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-post-statuses-controller.php
index 369cf3c757..e2cce55b65 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-post-statuses-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-post-statuses-controller.php
@@ -240,7 +240,7 @@ class WP_REST_Post_Statuses_Controller extends WP_REST_Controller {
 	 */
 	public function get_item_schema() {
 		$schema = array(
-			'$schema'              => 'http://json-schema.org/schema#',
+			'$schema'              => 'http://json-schema.org/draft-04/schema#',
 			'title'                => 'status',
 			'type'                 => 'object',
 			'properties'           => array(
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
index c4571d9721..d574ba8372 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php
@@ -201,7 +201,7 @@ class WP_REST_Post_Types_Controller extends WP_REST_Controller {
 	 */
 	public function get_item_schema() {
 		$schema = array(
-			'$schema'              => 'http://json-schema.org/schema#',
+			'$schema'              => 'http://json-schema.org/draft-04/schema#',
 			'title'                => 'type',
 			'type'                 => 'object',
 			'properties'           => array(
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
index 80027cfea8..8d65252537 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
@@ -1685,7 +1685,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 	public function get_item_schema() {
 
 		$schema = array(
-			'$schema'    => 'http://json-schema.org/schema#',
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
 			'title'      => $this->post_type,
 			'type'       => 'object',
 			// Base properties for every Post.
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
index a648fa2de5..298fcc5748 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
@@ -452,7 +452,7 @@ class WP_REST_Revisions_Controller extends WP_REST_Controller {
 	 */
 	public function get_item_schema() {
 		$schema = array(
-			'$schema'    => 'http://json-schema.org/schema#',
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
 			'title'      => "{$this->parent_post_type}-revision",
 			'type'       => 'object',
 			// Base properties for every Revision.
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 17a01b8ba6..1618e3597c 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
@@ -274,7 +274,7 @@ class WP_REST_Settings_Controller extends WP_REST_Controller {
 		$options = $this->get_registered_options();
 
 		$schema = array(
-			'$schema'    => 'http://json-schema.org/schema#',
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
 			'title'      => 'settings',
 			'type'       => 'object',
 			'properties' => array(),
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php
index ea97135677..9720a20945 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php
@@ -228,7 +228,7 @@ class WP_REST_Taxonomies_Controller extends WP_REST_Controller {
 	 */
 	public function get_item_schema() {
 		$schema = array(
-			'$schema'              => 'http://json-schema.org/schema#',
+			'$schema'              => 'http://json-schema.org/draft-04/schema#',
 			'title'                => 'taxonomy',
 			'type'                 => 'object',
 			'properties'           => array(
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
index ca0f53263a..7c145e198c 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
@@ -804,7 +804,7 @@ class WP_REST_Terms_Controller extends WP_REST_Controller {
 	 */
 	public function get_item_schema() {
 		$schema = array(
-			'$schema'    => 'http://json-schema.org/schema#',
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
 			'title'      => 'post_tag' === $this->taxonomy ? 'tag' : $this->taxonomy,
 			'type'       => 'object',
 			'properties' => array(
diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php
index 372c9654de..44d6367a54 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php
@@ -1129,7 +1129,7 @@ class WP_REST_Users_Controller extends WP_REST_Controller {
 	 */
 	public function get_item_schema() {
 		$schema = array(
-			'$schema'    => 'http://json-schema.org/schema#',
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
 			'title'      => 'user',
 			'type'       => 'object',
 			'properties' => array(