diff --git a/lib/model/delayed_function_caller.dart b/lib/model/delayed_function_caller.dart
index d439537..46efcba 100644
--- a/lib/model/delayed_function_caller.dart
+++ b/lib/model/delayed_function_caller.dart
@@ -1,7 +1,7 @@
 import 'dart:async';
 
 class DelayedFunctionCaller {
-  final Function function;
+  final void Function() function;
   final Duration duration;
   Timer? _timer;
 
@@ -14,8 +14,6 @@ class DelayedFunctionCaller {
     }
 
     // Create a timer that calls the function after the specified duration.
-    _timer = Timer(duration, () {
-      function();
-    });
+    _timer = Timer(duration, function);
   }
 }
diff --git a/lib/model/movie_manager.dart b/lib/model/movie_manager.dart
index 07300ea..874ff10 100644
--- a/lib/model/movie_manager.dart
+++ b/lib/model/movie_manager.dart
@@ -67,8 +67,8 @@ class MovieManager extends ChangeNotifier {
   void _insertMovie(MovieData movie) {
     int min = 0;
     int max = movies.length - 1;
-    while (min - 1 < max) {
-      int center = ((min + max) / 2).floor();
+    while (min <= max) {
+      int center = (min + max) ~/ 2;
       int diff =
           movie.releaseDate.date.compareTo(movies[center].releaseDate.date);
       if (diff < 0) {