diff --git a/CHANGELOG.md b/CHANGELOG.md
index 337f25a559..a284c6edea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,38 @@
+## 5.6.0
+
+### FEATURES
+
+- [msom] ACM basic support [#2689](https://github.com/particle-iot/device-os/pull/2689)
+
+### ENHANCEMENTS
+
+- [wiring] Add 64-bit string conversions [#2693](https://github.com/particle-iot/device-os/pull/2693)
+- [wiring] json: 64-bit support [#2695](https://github.com/particle-iot/device-os/pull/2695)
+- [msom] increase NCP baudrate to 921600, doubling throughput [#2706](https://github.com/particle-iot/device-os/pull/2706)
+- [network] Wiznet Ethernet performance improvements [#2708](https://github.com/particle-iot/device-os/pull/2708)
+
+### BUGFIXES
+
+- [gen3] hal: fixes the issue that UARTE RX may loss data [#2698](https://github.com/particle-iot/device-os/pull/2698)
+- [rtl872x] correctly handle SecureFault [#2699](https://github.com/particle-iot/device-os/pull/2699)
+- Fixes ncp-client not waiting for modem ready on cold boot [#2700](https://github.com/particle-iot/device-os/pull/2700)
+- [system] still pump system loop when SPARK_WLAN_SLEEP=1; Try to drain ISR task queue quicker [#2702](https://github.com/particle-iot/device-os/pull/2702)
+- [rtl872x] Fix unintentional pin changes for Serial1 RTS/CTS [#2703](https://github.com/particle-iot/device-os/pull/2703)
+- [rtl872x] fix multiple BLE issues [#2710](https://github.com/particle-iot/device-os/pull/2710)
+- Asset OTA fixes [#2711](https://github.com/particle-iot/device-os/pull/2711)
+
+
+### INTERNAL
+
+- [services] add long long support to printf/scanf [#2694](https://github.com/particle-iot/device-os/pull/2694)
+- fix printf/scanf for floating point numbers, add tests [#2696](https://github.com/particle-iot/device-os/pull/2696
+- [msom] support 16MB GD flash [#2701](https://github.com/particle-iot/device-os/pull/2701)
+- [msom] Support burnin tests [#2704](https://github.com/particle-iot/device-os/pull/2704)
+- [gen3] reduce flash usage [#2705](https://github.com/particle-iot/device-os/pull/2705)
+- Erase factory reset app after test runner completes [#2709](https://github.com/particle-iot/device-os/pull/2709)
+- Fix dual stack UDP bind behavior with LWIP_IPV6_DEFINES_ONLY [#2712](https://github.com/particle-iot/device-os/pull/2712)
+- Update WB makefile version [#2713](https://github.com/particle-iot/device-os/pull/2713)
+
 ## 5.5.0
 
 ### FEATURES
diff --git a/build/release.sh b/build/release.sh
index bf6d7f3f0b..bd5d4af878 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=${VERSION:="5.5.0"}
+VERSION=${VERSION:="5.6.0"}
 
 function display_help ()
 {
diff --git a/build/version.mk b/build/version.mk
index 762800cba4..783ed85050 100755
--- a/build/version.mk
+++ b/build/version.mk
@@ -1,7 +1,7 @@
-VERSION_STRING = 5.5.0
+VERSION_STRING = 5.6.0
 
 # PRODUCT_FIRMWARE_VERSION reported by default
 # FIXME: Unclear if this is used, PRODUCT_FIRMWARE_VERSION defaults to 65535 every release
-VERSION = 5501
+VERSION = 5600
 
 CFLAGS += -DSYSTEM_VERSION_STRING=$(VERSION_STRING)
diff --git a/modules/shared/system_module_version.mk b/modules/shared/system_module_version.mk
index 063181959a..82a7454726 100644
--- a/modules/shared/system_module_version.mk
+++ b/modules/shared/system_module_version.mk
@@ -1,6 +1,6 @@
 # Skip to next 100 every v0.x.0 release (e.g. 108 for v0.6.2 to 200 for v0.7.0-rc.1)
 # Bump by 1 for every prerelease or release with the same v0.x.* base.
-COMMON_MODULE_VERSION ?= 5501
+COMMON_MODULE_VERSION ?= 5600
 SYSTEM_PART1_MODULE_VERSION ?= $(COMMON_MODULE_VERSION)
 
 RELEASE_080_MODULE_VERSION_BASE ?= 300
@@ -14,7 +14,7 @@ USER_PART_MODULE_VERSION ?= 6
 # Skip to next 100 every v0.x.0 release (e.g. 11 for v0.6.2 to 100 for v0.7.0-rc.1),
 # but only if the bootloader has changed since the last v0.x.0 release.
 # Bump by 1 for every updated bootloader image for a release with the same v0.x.* base.
-BOOTLOADER_VERSION ?= 2300
+BOOTLOADER_VERSION ?= 2400
 
 ifeq ($(PLATFORM_MCU),rtl872x)
 PREBOOTLOADER_MBR_VERSION ?= 2
@@ -26,7 +26,7 @@ endif
 # this version usually lags behind the current bootloader version, to avoid non-mandatory updates.
 ifeq ($(PLATFORM_GEN),3)
 ifeq ($(PLATFORM_MCU),rtl872x)
-BOOTLOADER_DEPENDENCY = 2300
+BOOTLOADER_DEPENDENCY = 2400
 else # ifeq ($(PLATFORM_MCU),rtl872x)
 BOOTLOADER_DEPENDENCY = 2300
 endif # ifeq ($(PLATFORM_GEN),3)
diff --git a/system/inc/system_version.h b/system/inc/system_version.h
index 0f41251856..e971cbac61 100644
--- a/system/inc/system_version.h
+++ b/system/inc/system_version.h
@@ -212,7 +212,8 @@ extern "C" {
 #define SYSTEM_VERSION_v541         SYSTEM_VERSION_DEFAULT(5, 4, 1)
 #define SYSTEM_VERSION_v550RC1        SYSTEM_VERSION_RC(5, 5, 0, 1)
 #define SYSTEM_VERSION_v550         SYSTEM_VERSION_DEFAULT(5, 5, 0)
-#define SYSTEM_VERSION SYSTEM_VERSION_v550
+#define SYSTEM_VERSION_v560         SYSTEM_VERSION_DEFAULT(5, 6, 0)
+#define SYSTEM_VERSION SYSTEM_VERSION_v560
 
 /**
  * Previously we would set the least significant byte to 0 for the final release, but to make
@@ -389,6 +390,7 @@ extern "C" {
 #define SYSTEM_VERSION_541
 #define SYSTEM_VERSION_550RC1
 #define SYSTEM_VERSION_550
+#define SYSTEM_VERSION_560
 
 typedef struct __attribute__((packed)) SystemVersionInfo
 {
diff --git a/system/system-versions.md b/system/system-versions.md
index 02e3a7d467..c63f1eddb9 100644
--- a/system/system-versions.md
+++ b/system/system-versions.md
@@ -173,6 +173,7 @@
 | 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 |
 | 1200 | 4100 | 4.1.0         |      Argon, Boron, B SoM, B5 SoM, Tracker, E Som X |
+| 1200 | 4200 | 4.2.0         |      Argon, Boron, B SoM, B5 SoM, Tracker, E Som X |
 | 2000 | 5000 | 5.0.0-alpha.1 |      Argon, Boron, B SoM, B5 SoM, Tracker, E Som X, P2 |
 | 2000 | 5001 | 5.0.0-alpha.2 |      Argon, Boron, B SoM, B5 SoM, Tracker, E Som X, P2 |
 | 2000 | 5002 | 5.0.0         |      Argon, Boron, B SoM, B5 SoM, Tracker, Tracker M, E Som X, P2 |
@@ -186,7 +187,7 @@
 | 2210 | 5410 | 5.4.1         |      Argon, Boron, B SoM, B5 SoM, Tracker, Tracker M, E Som X, P2 |
 | 2300 | 5500 | 5.5.0-rc.1    |      Argon, Boron, B SoM, B5 SoM, Tracker, Tracker M, E Som X, M SoM, P2 |
 | 2300 | 5501 | 5.5.0         |      Argon, Boron, B SoM, B5 SoM, Tracker, Tracker M, E Som X, M SoM, P2 |
-| 1200 | 4200 | 4.2.0         |      Argon, Boron, B SoM, B5 SoM, Tracker, E Som X |
+| 2400 | 5600 | 5.6.0         |      Argon, Boron, B SoM, B5 SoM, Tracker, Tracker M, E Som X, M SoM, P2 |
 
 [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.