diff --git a/app/release/app-release-4.1.3a.apk b/app/release/app-release-4.1.3a.apk
new file mode 100644
index 0000000..c03b04a
Binary files /dev/null and b/app/release/app-release-4.1.3a.apk differ
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 8e18ddf..a1c1606 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -3,7 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     package="uk.org.openseizuredetector"
     android:versionCode="115"
-    android:versionName="4.1.3">
+    android:versionName="4.1.3a">
     <!-- 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/SdData.java b/app/src/main/java/uk/org/openseizuredetector/SdData.java
index 6eae730..cd423d6 100644
--- a/app/src/main/java/uk/org/openseizuredetector/SdData.java
+++ b/app/src/main/java/uk/org/openseizuredetector/SdData.java
@@ -123,7 +123,7 @@ public class SdData implements Parcelable {
 
     /*
      * Intialise this SdData object from a JSON String
-     * FIXME - add O2saturation with checking in case it is not included in the data
+     *
      */
     public boolean fromJSON(String jsonStr) {
         Log.v(TAG, "fromJSON() - parsing jsonString - " + jsonStr);
@@ -161,6 +161,13 @@ public class SdData implements Parcelable {
             for (int i = 0; i < specArr.length(); i++) {
                 simpleSpec[i] = specArr.optInt(i);
             }
+
+            try {
+                mO2Sat = jo.optDouble("o2Sat");
+            } catch (Exception e) {
+                Log.w(TAG,"Error parsing o2Sat value");
+                mO2Sat = -1;
+            }
             haveData = true;
             Log.v(TAG, "fromJSON(): sdData = " + this.toString());
             return true;
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index 136782c..ac3106b 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -294,4 +294,5 @@
     <string name="dataRetentionPeriodSummary">Okres (w dniach), przez który dane będą przechowywane i chronione przed usunięciem przez funkcję \'Automatyczne Czyszczenie Bazy Danych\'.</string>
     <string name="LogNDATitle">Zapisuj Normalne Dzienne Aktywności (NDA)</string>
     <string name="LogNDASummary">Cały czas rejestruj dane w systemie udostępniania danych, aby dostarczać w tle dane dotyczące \'NDA\', w celu zmniejszenia liczby fałszywych alarmów.</string>
+    <string name="cancelBtnTxt">Anuluj</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index fb0b304..7a654f4 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -3,6 +3,7 @@
     <string name="app_name">OpenSeizureDetector</string>
     <string name="changelog">
         "\n
+        \nV4.1.3 - Fixed display of O2 Saturation in Network Data Source, and added Polish Translations by Jacek Błoniarz-Łuczak
         \nV4.1.2 - Added Machine Learning (Artificial Intelligence) Detection Algorithm Option (CNN V0.24) and 'Normal Daily Activity (NDA) logging function
         \nV4.0.7 - Improvements to Data Sharing data log manager screen.
           - Introduced the &lt;b>Data Sharing&lt;/b> feature to allow users to share their seizure and false alarm data