diff --git a/CHANGELOG.md b/CHANGELOG.md
index afff189..237de6a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.6.1
+
+- Fix to be usable with monorepos using Pub workspaces. ([#85](https://github.com/fluttercommunity/import_sorter/pull/85))
+
 ## 4.6.0
 
 - Fix generated_plugin_registrant.dart not being ignored ([#52](https://github.com/fluttercommunity/import_sorter/pull/52))
diff --git a/bin/import_sorter.dart b/bin/import_sorter.dart
index ce34ccc..d9b15a8 100644
--- a/bin/import_sorter.dart
+++ b/bin/import_sorter.dart
@@ -41,8 +41,10 @@ void main(List<String> args) {
   stopwatch.start();
 
   final pubspecLockFile = File('$currentPath/pubspec.lock');
-  final pubspecLock = loadYaml(pubspecLockFile.readAsStringSync());
-  dependencies.addAll(pubspecLock['packages'].keys);
+  if (pubspecLockFile.existsSync()) {
+    final pubspecLock = loadYaml(pubspecLockFile.readAsStringSync());
+    dependencies.addAll(pubspecLock['packages'].keys);
+  }
 
   var emojis = false;
   var noComments = false;