diff --git a/lib/micropython-microbit-v2 b/lib/micropython-microbit-v2
index e4321a86..8aaa36b8 160000
--- a/lib/micropython-microbit-v2
+++ b/lib/micropython-microbit-v2
@@ -1 +1 @@
-Subproject commit e4321a866e3f8ef48a7f5b5e96db99cc39b09757
+Subproject commit 8aaa36b8d50211f5902d50e050632a88358d369f
diff --git a/src/board/constants.ts b/src/board/constants.ts
index 3c7e3bee..39a6ab9e 100644
--- a/src/board/constants.ts
+++ b/src/board/constants.ts
@@ -17,7 +17,7 @@ export const MICROBIT_HAL_PIN_P7 = 7;
 export const MICROBIT_HAL_PIN_P8 = 8;
 export const MICROBIT_HAL_PIN_P9 = 9;
 export const MICROBIT_HAL_PIN_P10 = 10;
-export const MICROBIT_HAL_PIN_P11 = 12;
+export const MICROBIT_HAL_PIN_P11 = 11
 export const MICROBIT_HAL_PIN_P12 = 12;
 export const MICROBIT_HAL_PIN_P13 = 13;
 export const MICROBIT_HAL_PIN_P14 = 14;
diff --git a/src/examples/sound_effects_user.py b/src/examples/sound_effects_user.py
index 9ba7595f..60895943 100644
--- a/src/examples/sound_effects_user.py
+++ b/src/examples/sound_effects_user.py
@@ -8,7 +8,7 @@
         duration=500,
         vol_start=100,
         vol_end=255,
-        wave=audio.SoundEffect.WAVEFORM_TRIANGLE,
+        waveform=audio.SoundEffect.WAVEFORM_TRIANGLE,
         fx=audio.SoundEffect.FX_VIBRATO,
         shape=audio.SoundEffect.SHAPE_LOG,
     )
diff --git a/src/mpconfigport.h b/src/mpconfigport.h
index 852e2685..96592812 100644
--- a/src/mpconfigport.h
+++ b/src/mpconfigport.h
@@ -68,7 +68,9 @@
 #define MICROPY_ENABLE_SCHEDULER                (1)
 
 // Fine control over Python builtins, classes, modules, etc
+#define MICROPY_PY_BUILTINS_STR_UNICODE         (1)
 #define MICROPY_PY_BUILTINS_MEMORYVIEW          (1)
+#define MICROPY_PY_BUILTINS_FROZENSET           (1)
 #define MICROPY_PY_BUILTINS_INPUT               (1)
 #define MICROPY_PY_BUILTINS_HELP                (1)
 #define MICROPY_PY_BUILTINS_HELP_TEXT           microbit_help_text
@@ -100,7 +102,7 @@
     { MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&mp_builtin_open_obj) },
 #endif
 
-#define MICROBIT_RELEASE "2.1.0"
+#define MICROBIT_RELEASE "2.1.1"
 #define MICROBIT_BOARD_NAME "micro:bit"
 #define MICROPY_HW_BOARD_NAME MICROBIT_BOARD_NAME " v" MICROBIT_RELEASE
 #define MICROPY_HW_MCU_NAME "nRF52833"