diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75a493e..63dbc94 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.0
+
+- Upgraded xml package dependency to 4.x
+
 ## 0.3.1
 
 - Fixed error handling nil UUIDs in recycle bin.
diff --git a/lib/src/crypto/key_encrypter_kdf.dart b/lib/src/crypto/key_encrypter_kdf.dart
index 0cf538b..b529d33 100644
--- a/lib/src/crypto/key_encrypter_kdf.dart
+++ b/lib/src/crypto/key_encrypter_kdf.dart
@@ -6,7 +6,6 @@ import 'package:crypto/crypto.dart' as crypto;
 import 'package:isolate/isolate_runner.dart';
 import 'package:kdbx/kdbx.dart';
 import 'package:kdbx/src/internal/byte_utils.dart';
-import 'package:kdbx/src/internal/crypto_utils.dart';
 import 'package:kdbx/src/kdbx_var_dictionary.dart';
 import 'package:logging/logging.dart';
 import 'package:pointycastle/export.dart';
diff --git a/lib/src/kdbx_format.dart b/lib/src/kdbx_format.dart
index eec8c27..efa72b3 100644
--- a/lib/src/kdbx_format.dart
+++ b/lib/src/kdbx_format.dart
@@ -73,7 +73,7 @@ class KdbxReadWriteContext {
 
   static final kdbxContext = Expando<KdbxReadWriteContext>();
 
-  static KdbxReadWriteContext kdbxContextForNode(xml.XmlParent node) {
+  static KdbxReadWriteContext kdbxContextForNode(xml.XmlNode node) {
     final ret = kdbxContext[node.document];
     if (ret == null) {
       throw StateError('Unable to locate kdbx context for document.');
@@ -82,7 +82,7 @@ class KdbxReadWriteContext {
   }
 
   static void setKdbxContextForNode(
-      xml.XmlParent node, KdbxReadWriteContext ctx) {
+      xml.XmlNode node, KdbxReadWriteContext ctx) {
     kdbxContext[node.document] = ctx;
   }
 
@@ -141,7 +141,7 @@ class KeyFileCredentials implements CredentialsPart {
         return KeyFileCredentials._(ProtectedValue.fromBinary(
             convert.hex.decode(keyFileAsString) as Uint8List));
       }
-      final xmlContent = xml.parse(keyFileAsString);
+      final xmlContent = xml.XmlDocument.parse(keyFileAsString);
       final key = xmlContent.findAllElements('Key').single;
       final dataString = key.findElements('Data').single;
       final dataBytes = base64.decode(dataString.text);
@@ -604,7 +604,7 @@ class KdbxFormat {
       KdbxReadWriteContext ctx, KdbxHeader header, String xmlString) {
     final gen = _createProtectedSaltGenerator(header);
 
-    final document = xml.parse(xmlString);
+    final document = xml.XmlDocument.parse(xmlString);
     KdbxReadWriteContext.setKdbxContextForNode(document, ctx);
 
     for (final el in document
diff --git a/pubspec.yaml b/pubspec.yaml
index 7673650..ebeea57 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -14,7 +14,7 @@ dependencies:
   crypto: '>=2.0.0 <3.0.0'
   pointycastle: '>=1.0.1 <2.0.0'
   cryptography: ^0.1.2
-  xml: '>=3.7.0 <4.0.0'
+  xml: '>=4.0.0 <5.0.0'
   uuid: '>=2.0.0 <3.0.0'
   meta: '>=1.0.0 <2.0.0'
   clock: '>=1.0.0 <2.0.0'