diff --git a/CHANGELOG.md b/CHANGELOG.md
index 423b610..8affa57 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,18 @@ 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.
 
+## [8.1.0] - 2018-01-15
+
+Device Protocol: 4.**2**.0 | Module Protocol: 4.0.0 | User Config: 4.0.0 | Hardware Config: 1.0.0
+
+- Enable left-half watchdog in reinit mode which seems to prevent freezes.
+- Slow down main bus I2C baud rate to 30kHz when BusPal is on to make firmware transfer more robust.
+- Implement UsbCommandId_GetSlaveI2cErrors. `DEVICEPROTOCOL:MINOR`
+- Implement UsbCommandId_SetI2cBaudRate. `DEVICEPROTOCOL:MINOR`
+- Implement DevicePropertyId_CurrentKbootCommand. `DEVICEPROTOCOL:MINOR`
+- Implement DevicePropertyId_I2cMainBusBaudRate. `DEVICEPROTOCOL:MINOR`
+- Implement DevicePropertyId_Uptime. `DEVICEPROTOCOL:MINOR`
+
 ## [8.0.1] - 2017-12-25
 
 Device Protocol: 4.1.0 | Module Protocol: 4.0.0 | User Config: 4.0.0 | Hardware Config: 1.0.0
diff --git a/scripts/package.json b/scripts/package.json
index 5e3befe..edb58f0 100644
--- a/scripts/package.json
+++ b/scripts/package.json
@@ -15,8 +15,8 @@
     "commander": "^2.11.0",
     "shelljs": "^0.7.8"
   },
-  "firmwareVersion": "8.0.1",
-  "deviceProtocolVersion": "4.1.0",
+  "firmwareVersion": "8.1.0",
+  "deviceProtocolVersion": "4.2.0",
   "moduleProtocolVersion": "4.0.0",
   "userConfigVersion": "4.0.0",
   "hardwareConfigVersion": "1.0.0",
diff --git a/shared/versions.h b/shared/versions.h
index a259ecf..feb3886 100644
--- a/shared/versions.h
+++ b/shared/versions.h
@@ -19,11 +19,11 @@
 // Variables:
 
     #define FIRMWARE_MAJOR_VERSION 8
-    #define FIRMWARE_MINOR_VERSION 0
-    #define FIRMWARE_PATCH_VERSION 1
+    #define FIRMWARE_MINOR_VERSION 1
+    #define FIRMWARE_PATCH_VERSION 0
 
     #define DEVICE_PROTOCOL_MAJOR_VERSION 4
-    #define DEVICE_PROTOCOL_MINOR_VERSION 1
+    #define DEVICE_PROTOCOL_MINOR_VERSION 2
     #define DEVICE_PROTOCOL_PATCH_VERSION 0
 
     #define MODULE_PROTOCOL_MAJOR_VERSION 4