diff --git a/CHANGELOG.md b/CHANGELOG.md
index 38b45676..eca35d8d 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,8 +2,10 @@
 
 # Changelog #
 
-#### Changes in release 6.3.2
-  +
+This is the changelog of the legacy 6.* branch, which is compatible with OpenCart 2.2 and lower. Our newer releases, which are compatible with OpenCart 2.3 and up, are available on the `master` branch.
+
+#### Changes in release 6.4.0
+  + Added the payment method KBC Payment Button.
 
 #### Changes in release 6.3.1
   + Update submodule [mollie-api-php](https://github.com/mollie/mollie-api-php) to `v1.5.1`
diff --git a/composer.json b/composer.json
index 70aa575b..72d0637b 100755
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
     "name": "mollie/opencart",
     "description": "Mollie module for OpenCart",
-    "version": "6.3.2",
+    "version": "6.4.0",
     "homepage": "https://www.mollie.com",
     "authors": [
         {