diff --git a/lib/class-wp-theme-json-data-gutenberg.php b/lib/class-wp-theme-json-data-gutenberg.php
index 4ff7775f4b559c..2c7eec9d5dbf4a 100644
--- a/lib/class-wp-theme-json-data-gutenberg.php
+++ b/lib/class-wp-theme-json-data-gutenberg.php
@@ -72,7 +72,7 @@ public function get_data() {
 	/**
 	 * Return theme JSON object.
 	 *
-	 * @since 18.3.0
+	 * @since 18.5.0
 	 *
 	 * @return WP_Theme_JSON
 	 */