diff --git a/module.json b/module.json
index 38fcf38..665c8bd 100644
--- a/module.json
+++ b/module.json
@@ -17,7 +17,7 @@
     "mbed-classic": "~0.0.4",
     "ble": "lancaster-university/BLE_API#v2.5.0+mb",
     "ble-nrf51822": "lancaster-university/nrf51822#v2.5.0+mb3",
-    "nrf51-sdk": "lancaster-university/nrf51-sdk#v2.2.0+mb"
+    "nrf51-sdk": "lancaster-university/nrf51-sdk#v2.2.0+mb2"
   },
   "extraIncludes": [
     "inc"