diff --git a/CHANGELOG.md b/CHANGELOG.md
index db2cc9c0b1..c6bc9ba7c7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 4.0.2
+
+### BUGFIXES
+- [gen3] Use OTP Feature flag to change ADC reference source [#2597](https://github.com/particle-iot/device-os/pull/2597)
+- [boron]Use the internal ADC reference on some Gen 3 platforms [#2588](https://github.com/particle-iot/device-os/pull/2588)
+
 ## 4.0.1
 
 ### BUGFIXES
diff --git a/build/release.sh b/build/release.sh
index dd314bded7..155653a164 100755
--- a/build/release.sh
+++ b/build/release.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 set -o errexit -o pipefail -o noclobber -o nounset
 
-VERSION=${VERSION:="4.0.1"}
+VERSION=${VERSION:="4.0.2"}
 
 function display_help ()
 {
diff --git a/build/version.mk b/build/version.mk
index 5dc5d9fc6a..f2040bd303 100755
--- a/build/version.mk
+++ b/build/version.mk
@@ -1,7 +1,7 @@
-VERSION_STRING = 4.0.1
+VERSION_STRING = 4.0.2
 
 # PRODUCT_FIRMWARE_VERSION reported by default
 # FIXME: Unclear if this is used, PRODUCT_FIRMWARE_VERSION defaults to 65535 every release
-VERSION = 4005
+VERSION = 4006
 
 CFLAGS += -DSYSTEM_VERSION_STRING=$(VERSION_STRING)
diff --git a/modules/shared/system_module_version.mk b/modules/shared/system_module_version.mk
index 65dcc8c544..e0e2c30adb 100644
--- a/modules/shared/system_module_version.mk
+++ b/modules/shared/system_module_version.mk
@@ -1,6 +1,6 @@
 # Skip to next 100 every vx.N.x release (e.g. 11 for v0.6.2 to 100 for v0.7.0-rc.1),
 # Bump by 1 for every prerelease or release with the same vx.N.* base.
-COMMON_MODULE_VERSION ?= 4005
+COMMON_MODULE_VERSION ?= 4006
 SYSTEM_PART1_MODULE_VERSION ?= $(COMMON_MODULE_VERSION)
 
 RELEASE_080_MODULE_VERSION_BASE ?= 300
diff --git a/system/inc/system_version.h b/system/inc/system_version.h
index 8b797e0164..a8b451ac1c 100644
--- a/system/inc/system_version.h
+++ b/system/inc/system_version.h
@@ -194,7 +194,8 @@ extern "C" {
 #define SYSTEM_VERSION_v400         SYSTEM_VERSION_DEFAULT(4, 0, 0)
 #define SYSTEM_VERSION_v401RC1        SYSTEM_VERSION_RC(4, 0, 1, 1)
 #define SYSTEM_VERSION_v401         SYSTEM_VERSION_DEFAULT(4, 0, 1)
-#define SYSTEM_VERSION SYSTEM_VERSION_v401
+#define SYSTEM_VERSION_v402         SYSTEM_VERSION_DEFAULT(4, 0, 2)
+#define SYSTEM_VERSION SYSTEM_VERSION_v402
 
 // These are required for some of the dynalib checks
 #define SYSTEM_VERSION_v500ALPHA1   SYSTEM_VERSION_ALPHA(5, 0, 0, 1)
@@ -358,6 +359,7 @@ extern "C" {
 #define SYSTEM_VERSION_400
 #define SYSTEM_VERSION_401RC1
 #define SYSTEM_VERSION_401
+#define SYSTEM_VERSION_402
 
 typedef struct __attribute__((packed)) SystemVersionInfo
 {
diff --git a/system/system-versions.md b/system/system-versions.md
index 950e780c9b..805e8b4dab 100644
--- a/system/system-versions.md
+++ b/system/system-versions.md
@@ -160,6 +160,7 @@
 | 1101 | 4003 | 4.0.0         |      Argon, Boron, B SoM, B5 SoM, Tracker, E Som X |
 | 1101 | 4004 | 4.0.1-rc.1    |      Argon, Boron, B SoM, B5 SoM, Tracker, E Som X |
 | 1101 | 4005 | 4.0.1         |      Argon, Boron, B SoM, B5 SoM, Tracker, E Som X |
+| 1101 | 4006 | 4.0.2         |      Argon, Boron, B SoM, B5 SoM, Tracker, E Som X |
 
 
 [1] For 0.8.0-rc.1, The v101 bootloader was also released in the Github releases as v200. Thus the next released bootloader in the 0.8.x line should be v201. As of 4/5/2018: 22 device had v200 bootloaders.