diff --git a/bluetooth/index.md b/bluetooth/index.md
index 1845ac3..278efb3 100644
--- a/bluetooth/index.md
+++ b/bluetooth/index.md
@@ -16,9 +16,7 @@ The micro:bit processor has an on-board [Bluetooth](http://blog.bluetooth.com/a-
 ## Bluetooth software stack
 
 <span class="v1">v1</span> Nordic Semiconductor [Soft Device S110](https://www.nordicsemi.com/Software-and-Tools/Software/S110)
-<span class="v2">V2</span> Nordic Semiconductor [Soft Device S140](https://www.nordicsemi.com/Software-and-tools/Software/S140)
-
-We may switch to [S113](https://www.nordicsemi.com/Software-and-tools/Software/S113) and [S122](https://www.nordicsemi.com/Software-and-tools/Software/S122) at compile time to save flash memory (if this affects anything you are working on please [contact micro:bit support](https://support.microbit.org/en/support/tickets/new)).
+<span class="v2">V2</span> Nordic Semiconductor [Soft Device S113](https://www.nordicsemi.com/Software-and-tools/Software/S113)
 
 Using Bluetooth, you can connect to other devices and send and receive data from and to the micro:bit.
 
diff --git a/hardware/index.md b/hardware/index.md
index 18a232f..bd63ceb 100644
--- a/hardware/index.md
+++ b/hardware/index.md
@@ -55,7 +55,7 @@ There is an on-board 2.4GHz radio peripheral used to provide Bluetooth and custo
 
 ### Bluetooth Wireless Communication
 
-The on-board 2.4GHz supports Bluetooth communications via the [Nordic S140 SoftDevice](https://www.nordicsemi.com/Software-and-Tools/Software/S140), which provides a fully qualified Bluetooth low energy stack.
+The on-board 2.4GHz supports Bluetooth communications via the [Nordic S113 SoftDevice](https://www.nordicsemi.com/Software-and-Tools/Software/S113), which provides a fully qualified Bluetooth low energy stack.
 This allows the micro:bit to communicate with a wide range of Bluetooth devices, including smartphones and tablets.
 
 | item          | details
diff --git a/software/runtime.md b/software/runtime.md
index cc43962..b21411c 100644
--- a/software/runtime.md
+++ b/software/runtime.md
@@ -103,7 +103,7 @@ micro:bit was based on the well-established Mbed 2.0 SDK, with which Mbed 5 is c
 
 The Mbed abstraction for the Nordic chip is built on top of the Nordic nRF5 SDK https://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF5-SDK
 
-Crucially, this includes Nordic's [Soft Device 110](https://www.nordicsemi.com/Software-and-Tools/Software/S110) <span class="v1">v1</span> / [Soft Device 140](https://www.nordicsemi.com/Software-and-tools/Software/S140) <span class="v2">V2</span>, a binary object that gets included into any hex file for the micro:bit that manages control of the radio to allow the micro:bit to use the industry standard Bluetooth Low Energy protocols.
+Crucially, this includes Nordic's [Soft Device 110](https://www.nordicsemi.com/Software-and-Tools/Software/S110) <span class="v1">v1</span> / [Soft Device 113](https://www.nordicsemi.com/Software-and-tools/Software/S113) <span class="v2">V2</span>, a binary object that gets included into any hex file for the micro:bit that manages control of the radio to allow the micro:bit to use the industry standard Bluetooth Low Energy protocols.
 
 The SoftDevice runs on the same MCU as the user's code, and when using the Mbed BLE APIs (that the micro:bit runtime also uses), calls are made into SoftDevice. SoftDevice also occupies the highest priority interrupts, so that user code can be pre-empted by SoftDevice when this is required for the radio to function properly.