diff --git a/system/CodeIgniter.php b/system/CodeIgniter.php
index 2d166fe284b4..4fbe9b638900 100644
--- a/system/CodeIgniter.php
+++ b/system/CodeIgniter.php
@@ -59,7 +59,7 @@ class CodeIgniter
 	/**
 	 * The current version of CodeIgniter Framework
 	 */
-	const CI_VERSION = '4.0.0-dev';
+	const CI_VERSION = '4.0.0-alpha.1';
 
 	/**
 	 * App startup time.
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 8a21c7946f7f..e60d2cd9103f 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -2,10 +2,10 @@
 Change Log
 ##########
 
-Version |release|
+Version 4.0.0-alpha.1
 =================================
 
-Release Date: Not Released
+Release Date: September 28, 2018
 
 **Rewrite of the CodeIgniter framework**