diff --git a/src/CommonMarkConverter.php b/src/CommonMarkConverter.php
index 651fb8a51b..6438a3be2f 100644
--- a/src/CommonMarkConverter.php
+++ b/src/CommonMarkConverter.php
@@ -27,7 +27,7 @@ class CommonMarkConverter extends Converter
      * @deprecated in 1.5.0 and will be removed from 2.0.0.
      *   Use \Composer\InstalledVersions provided by composer-runtime-api instead.
      */
-    public const VERSION = '1.5-dev';
+    public const VERSION = '1.5.8';
 
     /** @var EnvironmentInterface */
     protected $environment;