diff --git a/pkg/nnbd_migration/lib/src/preview/preview_site.dart b/pkg/nnbd_migration/lib/src/preview/preview_site.dart
index 5748c5b00bd..6ac9ec8c293 100644
--- a/pkg/nnbd_migration/lib/src/preview/preview_site.dart
+++ b/pkg/nnbd_migration/lib/src/preview/preview_site.dart
@@ -7,8 +7,8 @@ import 'dart:io';
 import 'dart:math';
 import 'dart:typed_data';
 
+import 'package:analyzer/src/manifest/charcodes.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
-import 'package:charcode/charcode.dart';
 import 'package:cli_util/cli_logging.dart';
 import 'package:meta/meta.dart';
 import 'package:nnbd_migration/src/edit_plan.dart';
diff --git a/pkg/nnbd_migration/pubspec.yaml b/pkg/nnbd_migration/pubspec.yaml
index 4ed12f1f45d..e89625b9caa 100644
--- a/pkg/nnbd_migration/pubspec.yaml
+++ b/pkg/nnbd_migration/pubspec.yaml
@@ -11,7 +11,6 @@ dependencies:
   analyzer: any
   analyzer_plugin: any
   args: ^2.3.0
-  charcode: ^1.1.0
   cli_util: ^0.3.5
   collection: ^1.15.0
   crypto: ^3.0.1