diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 3f3f018..62a7ee8 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -18,6 +18,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.ACCESS_NOTIFICATION_POLICY" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_SPECIAL_USE" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
diff --git a/app/src/main/java/org/nsh07/pomodoro/data/AppContainer.kt b/app/src/main/java/org/nsh07/pomodoro/data/AppContainer.kt
index f36a179..4ca23c9 100644
--- a/app/src/main/java/org/nsh07/pomodoro/data/AppContainer.kt
+++ b/app/src/main/java/org/nsh07/pomodoro/data/AppContainer.kt
@@ -17,6 +17,7 @@
 
 package org.nsh07.pomodoro.data
 
+import android.app.NotificationManager
 import android.app.PendingIntent
 import android.content.Context
 import androidx.compose.ui.graphics.Color
@@ -34,6 +35,7 @@ interface AppContainer {
     val appStatRepository: AppStatRepository
     val appTimerRepository: AppTimerRepository
     val notificationManager: NotificationManagerCompat
+    val notificationManagerService: NotificationManager
     val notificationBuilder: NotificationCompat.Builder
     val timerState: MutableStateFlow<TimerState>
     val time: MutableStateFlow<Long>
@@ -56,6 +58,9 @@ class DefaultAppContainer(context: Context) : AppContainer {
         NotificationManagerCompat.from(context)
     }
 
+    override val notificationManagerService: NotificationManager =
+        context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+
     override val notificationBuilder: NotificationCompat.Builder by lazy {
         NotificationCompat.Builder(context, "timer")
             .setSmallIcon(R.drawable.tomato_logo_notification)
diff --git a/app/src/main/java/org/nsh07/pomodoro/service/TimerService.kt b/app/src/main/java/org/nsh07/pomodoro/service/TimerService.kt
index b2423d1..d1ff85f 100644
--- a/app/src/main/java/org/nsh07/pomodoro/service/TimerService.kt
+++ b/app/src/main/java/org/nsh07/pomodoro/service/TimerService.kt
@@ -30,7 +30,6 @@ import android.os.Vibrator
 import android.os.VibratorManager
 import androidx.compose.ui.graphics.toArgb
 import androidx.core.app.NotificationCompat
-import androidx.core.app.NotificationManagerCompat
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -53,7 +52,8 @@ class TimerService : Service() {
 
     private val timerRepository by lazy { appContainer.appTimerRepository }
     private val statRepository by lazy { appContainer.appStatRepository }
-    private val notificationManager by lazy { NotificationManagerCompat.from(this) }
+    private val notificationManager by lazy { appContainer.notificationManager }
+    private val notificationManagerService by lazy { appContainer.notificationManagerService }
     private val notificationBuilder by lazy { appContainer.notificationBuilder }
     private val _timerState by lazy { appContainer.timerState }
     private val _time by lazy { appContainer.time }