diff --git a/app/src/main/java/com/nextcloud/client/device/DeviceInfo.kt b/app/src/main/java/com/nextcloud/client/device/DeviceInfo.kt
index f4d862cbe3..f23f5ead6a 100644
--- a/app/src/main/java/com/nextcloud/client/device/DeviceInfo.kt
+++ b/app/src/main/java/com/nextcloud/client/device/DeviceInfo.kt
@@ -12,7 +12,7 @@ import android.os.Build
 import java.util.Locale
 
 class DeviceInfo {
-    val vendor: String = Build.MANUFACTURER.toLowerCase(Locale.ROOT)
+    val vendor: String = Build.MANUFACTURER.lowercase(Locale.ROOT)
     val apiLevel: Int = Build.VERSION.SDK_INT
     val androidVersion = Build.VERSION.RELEASE
 
diff --git a/app/src/main/java/com/nextcloud/client/etm/pages/EtmMigrations.kt b/app/src/main/java/com/nextcloud/client/etm/pages/EtmMigrations.kt
index 8f93432865..cf9cbd3057 100644
--- a/app/src/main/java/com/nextcloud/client/etm/pages/EtmMigrations.kt
+++ b/app/src/main/java/com/nextcloud/client/etm/pages/EtmMigrations.kt
@@ -40,7 +40,7 @@ class EtmMigrations : EtmBaseFragment() {
 
     fun showStatus() {
         val builder = StringBuilder()
-        val status = vm.migrationsStatus.toString().toLowerCase(Locale.US)
+        val status = vm.migrationsStatus.toString().lowercase(Locale.US)
         builder.append("Migration status: $status\n")
         val lastMigratedVersion = if (vm.lastMigratedVersion >= 0) {
             vm.lastMigratedVersion.toString()
diff --git a/app/src/main/java/com/nextcloud/client/media/PlayerService.kt b/app/src/main/java/com/nextcloud/client/media/PlayerService.kt
index ec6012f533..f953a79973 100644
--- a/app/src/main/java/com/nextcloud/client/media/PlayerService.kt
+++ b/app/src/main/java/com/nextcloud/client/media/PlayerService.kt
@@ -117,7 +117,7 @@ class PlayerService : Service() {
         }
 
         val pendingStop = PendingIntent.getService(this, 0, stop, PendingIntent.FLAG_IMMUTABLE)
-        notificationBuilder.addAction(0, getString(R.string.player_stop).toUpperCase(Locale.getDefault()), pendingStop)
+        notificationBuilder.addAction(0, getString(R.string.player_stop).lowercase(Locale.getDefault()), pendingStop)
 
         val toggle = Intent(this, PlayerService::class.java).apply {
             action = ACTION_TOGGLE
@@ -126,7 +126,7 @@ class PlayerService : Service() {
         val pendingToggle = PendingIntent.getService(this, 0, toggle, PendingIntent.FLAG_IMMUTABLE)
         notificationBuilder.addAction(
             0,
-            getString(R.string.player_toggle).toUpperCase(Locale.getDefault()),
+            getString(R.string.player_toggle).lowercase(Locale.getDefault()),
             pendingToggle
         )
     }