diff --git a/CHANGELOG.md b/CHANGELOG.md
index d57d930..86c8307 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
         - Removed automatic refresh of shared data events list (Issue #62)
         - Added option to include warnings in shared data events list (Issue #64)
         - Added catch of NullPointerException in LogManager in case of network disruption (Issue #61)
+        - Added 'demo mode' on main screen when phone data source selected and highighted it in warning colour (Issue #56)
+        - Changed default local data retention time to 7 days (from 28) - works around #63
     V4.0.6 - fixed issue with O2sat data not being recorded to database
     V4.0.5 - Added support for 3D data logging
             - Fixed issue with seizure reporting crashing if quotation marks included in text.
diff --git a/app/src/main/res/xml/logging_prefs.xml b/app/src/main/res/xml/logging_prefs.xml
index a4d11c1..9ccd082 100644
--- a/app/src/main/res/xml/logging_prefs.xml
+++ b/app/src/main/res/xml/logging_prefs.xml
@@ -21,7 +21,7 @@
         android:summary="@string/AutoPruneDbSummary"
         android:title="@string/AutoPruneDbTitle" />
     <EditTextPreference
-        android:defaultValue="28"
+        android:defaultValue="7"
         android:key="DataRetentionPeriod"
         android:summary="@string/dataRetentionPeriodSummary"
         android:title="@string/dataRetentionPeriodTitle" />