diff --git a/src/main/resources/changelog.txt b/src/main/resources/changelog.txt
index aa756a11..0239d0d0 100644
--- a/src/main/resources/changelog.txt
+++ b/src/main/resources/changelog.txt
@@ -1,6 +1,17 @@
 Spring Data Couchbase Changelog
 ===============================
 
+Changes in version 4.0.0.M1 (2020-01-16)
+----------------------------------------
+* DATACOUCH-499 - Bump Major version to 4.0.0.
+* DATACOUCH-498 - Update copyright years to 2020.
+* DATACOUCH-492 - Upgrade to Couchbase Driver 2.7.10.
+* DATACOUCH-489 - Enable JDK 11+ builds.
+* DATACOUCH-485 - Migrate tests to AssertJ.
+* DATACOUCH-483 - Javadoc not deployed.
+* DATACOUCH-482 - Release 4.0 M1 (Neumann).
+
+
 Changes in version 3.2.4.RELEASE (2020-01-15)
 ---------------------------------------------
 * DATACOUCH-498 - Update copyright years to 2020.
@@ -969,3 +980,4 @@ Release Notes - Spring Data Couchbase - Version 1.0 M1 - 2013-09-11
 
 
 
+