lib/app/pages/source_page.dart

@@ -45,7 +45,7 @@ class SourcePage extends HookConsumerWidget {
       autofillHints: const [AutofillHints.url],
       required: true,
       validator: (value, label) {
-        if (!value!.contains(RegExp(r'https?:\/\/'))) {
+        if (Uri.tryParse(value!) == null) {
           return '$label must be a valid URL';
         }
         return null;