diff --git a/package.json b/package.json
index 7bc0647ba9..38a60d9de9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "WordPress",
-  "version": "4.9.8",
+  "version": "4.9.9",
   "description": "WordPress is web software you can use to create a beautiful website or blog.",
   "repository": {
     "type": "svn",
diff --git a/src/wp-includes/version.php b/src/wp-includes/version.php
index fafe6d1d59..416a4039e7 100644
--- a/src/wp-includes/version.php
+++ b/src/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9.8-src';
+$wp_version = '4.9.9-alpha-43554-src';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.