diff --git a/lib/app.dart b/lib/app.dart
index bb11b5f..1757916 100644
--- a/lib/app.dart
+++ b/lib/app.dart
@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 
 import 'backend.dart';
@@ -14,6 +16,7 @@ class _AppState extends State<App> with SingleTickerProviderStateMixin {
 
   AnimationController playerBarAnimation;
   Backend backend;
+  StreamSubscription<bool> playerActiveSubscription;
 
   @override
   void initState() {
@@ -30,7 +33,12 @@ class _AppState extends State<App> with SingleTickerProviderStateMixin {
     super.didChangeDependencies();
 
     backend = Backend.of(context);
-    backend.playerActive.listen((active) =>
+
+    if (playerActiveSubscription != null) {
+      playerActiveSubscription.cancel();
+    }
+
+    playerActiveSubscription = backend.playerActive.listen((active) =>
         active ? playerBarAnimation.forward() : playerBarAnimation.reverse());
   }
 
@@ -79,4 +87,10 @@ class _AppState extends State<App> with SingleTickerProviderStateMixin {
       ),
     );
   }
+
+  @override
+  void dispose() {
+    super.dispose();
+    playerActiveSubscription.cancel();
+  }
 }
diff --git a/lib/widgets/play_pause_button.dart b/lib/widgets/play_pause_button.dart
index 42306f4..59af33a 100644
--- a/lib/widgets/play_pause_button.dart
+++ b/lib/widgets/play_pause_button.dart
@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 
 import '../backend.dart';
@@ -11,6 +13,7 @@ class _PlayPauseButtonState extends State<PlayPauseButton>
     with SingleTickerProviderStateMixin {
   AnimationController playPauseAnimation;
   Backend backend;
+  StreamSubscription<bool> playingSubscription;
 
   @override
   void initState() {
@@ -25,7 +28,12 @@ class _PlayPauseButtonState extends State<PlayPauseButton>
     super.didChangeDependencies();
 
     backend = Backend.of(context);
-    backend.playing.listen((playing) =>
+
+    if (playingSubscription != null) {
+      playingSubscription.cancel();
+    }
+
+    playingSubscription = backend.playing.listen((playing) =>
         playing ? playPauseAnimation.forward() : playPauseAnimation.reverse());
   }
 
@@ -39,4 +47,10 @@ class _PlayPauseButtonState extends State<PlayPauseButton>
       onPressed: backend.playPause,
     );
   }
+
+  @override
+  void dispose() {
+    super.dispose();
+    playingSubscription.cancel();
+  }
 }