diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5aa6787..3dc3f21 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is loosely based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to the [UHK Versioning](VERSIONING.md) conventions.
 
+## [4.0.0] - 2017-11-30
+
+Data Model: 3.0.0 (major bump) | USB Protocol: 2.0.0 (unchanged) | Slave Protocol: 3.0.0 (unchanged)
+
+- Implement mouse movement and scrolling deceleration and acceleration.
+- Toggle layers upon double tapping their keys. Make the double tap timeout configurable.
+- Make the parser read additional user configuration properties: dataModelMajorVersion, dataModelMinorVersion, dataModelPatchVersion, doubleTapSwitchLayerTimeout, iconsAndLayerTextsBrightness, alphanumericSegmentsBrightness, keyBacklightBrightness, mouseMoveInitialSpeed, mouseMoveAcceleration, mouseMoveDeceleratedSpeed, mouseMoveBaseSpeed, mouseMoveAcceleratedSpeed, mouseScrollInitialSpeed, mouseScrollAcceleration, mouseScrollDeceleratedSpeed, mouseScrollBaseSpeed, mouseScrollAcceleratedSpeed. `DATAMODEL:MAJOR`
+
 ## [3.0.0] - 2017-11-15
 
 Data Model: 2.0.0 (major bump) | USB Protocol: 2.0.0 (major bump) | Slave Protocol: 3.0.0 (major bump)
diff --git a/scripts/package.json b/scripts/package.json
index 9bc9945..c135787 100644
--- a/scripts/package.json
+++ b/scripts/package.json
@@ -15,10 +15,10 @@
     "commander": "^2.11.0",
     "shelljs": "^0.7.8"
   },
-  "version": "3.0.0",
-  "dataModelVersion": "1.0.0",
-  "usbProtocolVersion": "1.2.0",
-  "slaveProtocolVersion": "2.1.0",
+  "version": "4.0.0",
+  "dataModelVersion": "3.0.0",
+  "usbProtocolVersion": "2.0.0",
+  "slaveProtocolVersion": "3.0.0",
   "devices": [
     {
       "deviceId": 1,