diff --git a/lib/src/messages/common/utils.dart b/lib/src/messages/common/utils.dart
index 6e3eb42..8441b6a 100644
--- a/lib/src/messages/common/utils.dart
+++ b/lib/src/messages/common/utils.dart
@@ -68,7 +68,7 @@ Uint8List encodeUtf16le(String s) => Uint8List.fromList(
     );
 
 Uint8List createLMHashedPasswordV1(String password) {
-  var oemPassword = ascii.encode(password.toUpperCase());
+  var oemPassword = utf8.encode(password.toUpperCase());
   var length = math.min(oemPassword.length, 14);
   var keyBytes = List<int>.filled(14, 0);
   _arrayCopy(oemPassword, 0, keyBytes, 0, length);
diff --git a/pubspec.yaml b/pubspec.yaml
index 65b9af2..edfd175 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,13 +1,13 @@
 name: ntlm
 description: Library for making HTTP requests that require NTLM authentication
-version: 2.0.1
+version: 2.0.3
 homepage: https://github.com/mrbbot/ntlm
 
 environment:
   sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
-  http: ^0.13.1
+  http: ^1.2.2
   pointycastle: ^3.0.1
   fixnum: ^1.0.0