diff --git a/boards/arduino_mkrzero/CHANGELOG.md b/boards/arduino_mkrzero/CHANGELOG.md
index 3a0d6e25265..5a8779b9bc6 100644
--- a/boards/arduino_mkrzero/CHANGELOG.md
+++ b/boards/arduino_mkrzero/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Unreleased
 
+# v0.12.1
+
+- update to `atsamd-hal-0.16`, along with redefining pins using the bsp_pins! macro
+- split up library into pin definitions and peripheral & USB setup function definitions
+
 # v0.12.0
 
 - update to `atsamd-hal-0.14` and other latest dependencies (#564)
diff --git a/boards/arduino_mkrzero/Cargo.toml b/boards/arduino_mkrzero/Cargo.toml
index 79eb9af7df7..7bbbe778845 100644
--- a/boards/arduino_mkrzero/Cargo.toml
+++ b/boards/arduino_mkrzero/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "arduino_mkrzero"
-version = "0.12.0"
+version = "0.12.1"
 authors = ["Wez Furlong <wez@wezfurlong.org>", "David McGillicuddy <contact@djmcgill.co.uk>"]
 description = "Board Support crate for the Arduino MKRZERO"
 keywords = ["no-std", "arm", "cortex-m", "embedded-hal", "arduino"]