diff --git a/lib/src/json_schema/formats/idn_email_validator.dart b/lib/src/json_schema/formats/idn_email_validator.dart
index 3d73a8a2..b0ba1308 100644
--- a/lib/src/json_schema/formats/idn_email_validator.dart
+++ b/lib/src/json_schema/formats/idn_email_validator.dart
@@ -1,7 +1,9 @@
 import 'package:json_schema/src/json_schema/models/validation_context.dart';
+import 'package:rfc_6531/rfc_6531.dart' as rfc_6531;
 
 ValidationContext defaultIdnEmailValidator(ValidationContext context, String instanceData) {
-  // No maintained dart packages exist to validate RFC6531,
-  // and it's too complex for a regex, so best effort is to pass for now.
+  if (rfc_6531.regExp.firstMatch(instanceData) == null) {
+    context.addError('"idn-email" format not accepted $instanceData');
+  }
   return context;
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index 9054b3f1..4589a0b7 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -10,6 +10,7 @@ dependencies:
   collection: ^1.15.0
   http: ">=0.13.4 <2.0.0"
   logging: ^1.0.0
+  rfc_6531: ^1.0.0
   rfc_6901: '>=0.1.0 <0.3.0'
   uri: '>=0.11.1 <2.0.0'