diff --git a/pungi/checks.py b/pungi/checks.py
index 6f2d3c83..7f8f434f 100644
--- a/pungi/checks.py
+++ b/pungi/checks.py
@@ -450,11 +450,7 @@ def _extend_with_default_and_alias(validator_class, offline=False):
     def is_string_type(checker, instance):
         return isinstance(instance, six.string_types)
 
-    # type_checker = draft4_type_checker.redefine_many(
-    #     {"array": is_array, "regex": is_string_type, "url": is_string_type}
-    # )
-
-    return jsonschema.validators.extend(
+    validator = jsonschema.validators.extend(
         validator_class,
         {
             "properties": properties_validator,
@@ -464,8 +460,13 @@ def _extend_with_default_and_alias(validator_class, offline=False):
             "additionalProperties": _validate_additional_properties,
             "anyOf": _validate_any_of,
         },
-        # type_checker=type_checker,
     )
+    validator.DEFAULT_TYPES.update({
+        "array": (list, tuple),
+        "regex": six.string_types,
+        "url": six.string_types,
+    })
+    return validator
 
 
 class ConfigDeprecation(jsonschema.exceptions.ValidationError):