diff --git a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/fragment/ServerRowAdapter.kt b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/fragment/ServerRowAdapter.kt
index 85190acb..2b9e4be1 100644
--- a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/fragment/ServerRowAdapter.kt
+++ b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/fragment/ServerRowAdapter.kt
@@ -1,9 +1,7 @@
 package org.moire.ultrasonic.fragment
 
 import android.content.Context
-import android.graphics.Color
 import android.graphics.drawable.Drawable
-import android.os.Build
 import android.view.LayoutInflater
 import android.view.Menu
 import android.view.MenuItem
@@ -109,10 +107,8 @@ internal class ServerRowAdapter(
         }
 
         // Set colors
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-            icon?.setTint(ServerColor.getForegroundColor(context, setting?.color))
-            background?.setTint(ServerColor.getBackgroundColor(context, setting?.color))
-        }
+        icon?.setTint(ServerColor.getForegroundColor(context, setting?.color))
+        background?.setTint(ServerColor.getBackgroundColor(context, setting?.color))
 
         // Set the final drawables
         image?.setImageDrawable(icon)
@@ -120,32 +116,16 @@ internal class ServerRowAdapter(
 
         // Highlight the Active Server's row by changing its background
         if (index == activeServerProvider.getActiveServer().index) {
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-                layout?.background = ContextCompat.getDrawable(context, R.drawable.select_ripple)
-            } else {
-                layout?.setBackgroundResource(
-                    Util.getResourceFromAttribute(context, R.attr.list_selector_holo_selected)
-                )
-            }
+            layout?.background = ContextCompat.getDrawable(context, R.drawable.select_ripple)
         } else {
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-                layout?.background = ContextCompat.getDrawable(context, R.drawable.default_ripple)
-            } else {
-                layout?.setBackgroundResource(
-                    Util.getResourceFromAttribute(context, R.attr.list_selector_holo)
-                )
-            }
+            layout?.background = ContextCompat.getDrawable(context, R.drawable.default_ripple)
         }
 
         // Add the context menu for the row
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-            serverMenu?.background = ContextCompat.getDrawable(
-                context,
-                R.drawable.select_ripple_circle
-            )
-        } else {
-            serverMenu?.setBackgroundColor(Color.TRANSPARENT)
-        }
+        serverMenu?.background = ContextCompat.getDrawable(
+            context,
+            R.drawable.select_ripple_circle
+        )
 
         serverMenu?.setOnClickListener { view -> serverMenuClick(view, index) }
 
diff --git a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/AudioFocusHandler.kt b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/AudioFocusHandler.kt
index 2f36974a..34ad87cc 100644
--- a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/AudioFocusHandler.kt
+++ b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/AudioFocusHandler.kt
@@ -4,8 +4,6 @@ import android.content.Context
 import android.media.AudioAttributes
 import android.media.AudioManager
 import android.media.AudioManager.OnAudioFocusChangeListener
-import android.os.Build
-import androidx.annotation.RequiresApi
 import androidx.media.AudioAttributesCompat
 import androidx.media.AudioFocusRequestCompat
 import androidx.media.AudioManagerCompat
@@ -109,7 +107,6 @@ class AudioFocusHandler(private val context: Context) {
         private var lowerFocus = false
 
         // TODO: This can be removed if we switch to androidx.media2.player
-        @RequiresApi(Build.VERSION_CODES.LOLLIPOP)
         fun getAudioAttributes(): AudioAttributes {
             return AudioAttributes.Builder()
                 .setUsage(AudioAttributes.USAGE_MEDIA)
diff --git a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/LocalMediaPlayer.kt b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/LocalMediaPlayer.kt
index d30b5d00..0b0a1b42 100644
--- a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/LocalMediaPlayer.kt
+++ b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/LocalMediaPlayer.kt
@@ -10,11 +10,9 @@ package org.moire.ultrasonic.service
 import android.content.Context
 import android.content.Context.POWER_SERVICE
 import android.content.Intent
-import android.media.AudioManager
 import android.media.MediaPlayer
 import android.media.MediaPlayer.OnCompletionListener
 import android.media.audiofx.AudioEffect
-import android.os.Build
 import android.os.Handler
 import android.os.Looper
 import android.os.PowerManager
@@ -447,12 +445,7 @@ class LocalMediaPlayer : KoinComponent {
     }
 
     private fun setAudioAttributes(player: MediaPlayer) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-            player.setAudioAttributes(AudioFocusHandler.getAudioAttributes())
-        } else {
-            @Suppress("DEPRECATION")
-            player.setAudioStreamType(AudioManager.STREAM_MUSIC)
-        }
+        player.setAudioAttributes(AudioFocusHandler.getAudioAttributes())
     }
 
     @Suppress("ComplexCondition")
diff --git a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/MediaPlayerLifecycleSupport.kt b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/MediaPlayerLifecycleSupport.kt
index 1bcdfce5..c69b820b 100644
--- a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/MediaPlayerLifecycleSupport.kt
+++ b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/MediaPlayerLifecycleSupport.kt
@@ -12,7 +12,6 @@ import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
 import android.media.AudioManager
-import android.os.Build
 import android.view.KeyEvent
 import org.koin.core.component.KoinComponent
 import org.koin.core.component.inject
@@ -165,12 +164,7 @@ class MediaPlayerLifecycleSupport : KoinComponent {
             }
         }
 
-        val headsetIntentFilter: IntentFilter =
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-                IntentFilter(AudioManager.ACTION_HEADSET_PLUG)
-            } else {
-                IntentFilter(Intent.ACTION_HEADSET_PLUG)
-            }
+        val headsetIntentFilter = IntentFilter(AudioManager.ACTION_HEADSET_PLUG)
 
         applicationContext().registerReceiver(headsetEventReceiver, headsetIntentFilter)
     }