diff --git a/app/src/main/kotlin/com/simplemobiletools/clock/helpers/Config.kt b/app/src/main/kotlin/com/simplemobiletools/clock/helpers/Config.kt
index 3af7f77..b3eaa42 100644
--- a/app/src/main/kotlin/com/simplemobiletools/clock/helpers/Config.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/clock/helpers/Config.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import android.media.RingtoneManager
 import com.simplemobiletools.clock.extensions.gson.gson
 import com.simplemobiletools.clock.models.Alarm
+import com.simplemobiletools.clock.models.ObfuscatedAlarm
 import com.simplemobiletools.clock.models.ObfuscatedTimer
 import com.simplemobiletools.clock.models.Timer
 import com.simplemobiletools.commons.extensions.getDefaultAlarmSound
@@ -66,7 +67,15 @@ class Config(context: Context) : BaseConfig(context) {
 
     var alarmLastConfig: Alarm?
         get() = prefs.getString(ALARM_LAST_CONFIG, null)?.let { lastAlarm ->
-            gson.fromJson(lastAlarm, Alarm::class.java)
+            try {
+                if (lastAlarm.contains("\"b\"")) {
+                    gson.fromJson(lastAlarm, ObfuscatedAlarm::class.java).toAlarm()
+                } else {
+                    gson.fromJson(lastAlarm, Alarm::class.java)
+                }
+            } catch (e: Exception) {
+                null
+            }
         }
         set(alarm) = prefs.edit().putString(ALARM_LAST_CONFIG, gson.toJson(alarm)).apply()
 
diff --git a/app/src/main/kotlin/com/simplemobiletools/clock/models/Alarm.kt b/app/src/main/kotlin/com/simplemobiletools/clock/models/Alarm.kt
index 75f8fd4..3a7a34b 100644
--- a/app/src/main/kotlin/com/simplemobiletools/clock/models/Alarm.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/clock/models/Alarm.kt
@@ -1,5 +1,8 @@
 package com.simplemobiletools.clock.models
 
+import androidx.annotation.Keep
+
+@Keep
 data class Alarm(
     var id: Int,
     var timeInMinutes: Int,
@@ -11,3 +14,18 @@ data class Alarm(
     var label: String,
     var oneShot: Boolean = false
 )
+
+@Keep
+data class ObfuscatedAlarm(
+    var a: Int,
+    var b: Int,
+    var c: Int,
+    var d: Boolean,
+    var e: Boolean,
+    var f: String,
+    var g: String,
+    var h: String,
+    var i: Boolean = false
+) {
+    fun toAlarm() = Alarm(a, b, c, d, e, f, g, h, i)
+}
diff --git a/app/src/main/kotlin/com/simplemobiletools/clock/models/Timer.kt b/app/src/main/kotlin/com/simplemobiletools/clock/models/Timer.kt
index a124234..0b5a5d4 100644
--- a/app/src/main/kotlin/com/simplemobiletools/clock/models/Timer.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/clock/models/Timer.kt
@@ -33,16 +33,5 @@ data class ObfuscatedTimer(
     var i: String? = null,
     var j: Boolean = false
 ) {
-    fun toTimer(): Timer = Timer(
-        a,
-        b,
-        TimerState.Idle,
-        d,
-        e,
-        f,
-        g,
-        h,
-        i,
-        j
-    )
+    fun toTimer() = Timer(a, b, TimerState.Idle, d, e, f, g, h, i, j)
 }