diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5366663..31c08fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 	OpenSeizureDetector Android App - Change Log
 	============================================
-    V4.2.3 - Uses 3d accelerometer data to calculate magnitude if vector magnitude is not sent from data source.
+    V4.2.3c - Uses 3d accelerometer data to calculate magnitude if vector magnitude is not sent from data source.
     V4.2.2 - Added support for PineTime OSD Status reporting.
     V4.2.1 - Added support for PineTime wathes using the Bluetooth Data Source
     V4.1.0 - Added experimental support for neural network based seizure detector.
diff --git a/app/release/app-release-4.2.3a.apk b/app/release/app-release-4.2.3c.apk
similarity index 84%
rename from app/release/app-release-4.2.3a.apk
rename to app/release/app-release-4.2.3c.apk
index fb30812..3bc4444 100644
Binary files a/app/release/app-release-4.2.3a.apk and b/app/release/app-release-4.2.3c.apk differ
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index b825c69..bc56fb4 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,7 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:versionCode="137"
-    android:versionName="4.2.3a">
+    android:versionName="4.2.3c">
     <!-- android:allowBackup="false" -->
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
diff --git a/app/src/main/java/uk/org/openseizuredetector/SdDataSource.java b/app/src/main/java/uk/org/openseizuredetector/SdDataSource.java
index f995b31..f2f2171 100644
--- a/app/src/main/java/uk/org/openseizuredetector/SdDataSource.java
+++ b/app/src/main/java/uk/org/openseizuredetector/SdDataSource.java
@@ -363,6 +363,7 @@ public abstract class SdDataSource {
                             z = mSdData.rawData3D[i*3 + 2];
                             mSdData.rawData[i] = Math.sqrt(x*x + y*y + z*z);
                         }
+                        mSdData.mNsamp = 125;
                     } else {
                         // If we do not have vector magnitude or 3d data, set the vector magnitude array to zero.
                         Log.e(TAG, "ERROR - no accelerometer data received - setting it to zero");