diff --git a/app/build.gradle b/app/build.gradle
index 6f4c2ef7..b52347a9 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -66,7 +66,7 @@ dependencies {
     implementation 'com.flurry.android:analytics:6.9.2'
     implementation 'com.google.guava:guava:24.0-android'
     implementation 'com.google.code.findbugs:jsr305:3.0.1'
-    implementation 'com.google.android.exoplayer:exoplayer-core:2.9.1'
+    implementation 'com.google.android.exoplayer:exoplayer-core:2.7.3'
 
     implementation 'com.google.dagger:dagger:2.15'
     annotationProcessor 'com.google.dagger:dagger-compiler:2.15'
diff --git a/app/src/main/java/com/studio4plus/homerplayer/player/Player.java b/app/src/main/java/com/studio4plus/homerplayer/player/Player.java
index 5c14ec78..a829fecc 100644
--- a/app/src/main/java/com/studio4plus/homerplayer/player/Player.java
+++ b/app/src/main/java/com/studio4plus/homerplayer/player/Player.java
@@ -80,7 +80,8 @@ private ExtractorMediaSource.Factory getExtractorMediaSourceFactory() {
     }
 
     private class PlaybackControllerImpl
-            implements com.google.android.exoplayer2.Player.EventListener, PlaybackController {
+            extends com.google.android.exoplayer2.Player.DefaultEventListener
+            implements PlaybackController {
 
         private File currentFile;
         private Observer observer;
@@ -202,7 +203,8 @@ private String getFormatDescription() {
     }
 
     private class DurationQueryControllerImpl
-            implements com.google.android.exoplayer2.Player.EventListener, DurationQueryController {
+            extends com.google.android.exoplayer2.Player.DefaultEventListener
+            implements DurationQueryController {
 
         private final Iterator<File> iterator;
         private File currentFile;