diff --git a/.versionbot/CHANGELOG.yml b/.versionbot/CHANGELOG.yml
index 139c453..9a46852 100644
--- a/.versionbot/CHANGELOG.yml
+++ b/.versionbot/CHANGELOG.yml
@@ -1,3 +1,13 @@
+- commits:
+    - subject: Upgrade to postgres 12
+      hash: a1b0f390f03a975cc3b8edd0a0742a8dcc5c66df
+      body: ''
+      footer:
+        Change-type: major
+        change-type: major
+      author: Pagan Gazzard
+  version: 4.0.0
+  date: 2020-04-02T15:13:16.516Z
 - commits:
     - subject: Add machine-readable changelog
       hash: c8f3c4ce0f3772194901cd2a1c93e6f8fcddf9d7
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9292c8a..a4b95d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file
 automatically by Versionist. DO NOT EDIT THIS FILE MANUALLY!
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## v4.0.0 - 2020-04-02
+
+* Upgrade to postgres 12 [Pagan Gazzard]
+
 ## v3.0.1 - 2019-06-26
 
 * Add machine-readable changelog [Gergely Imreh]