diff --git a/flask_restx/model.py b/flask_restx/model.py
index 1b2f7b7d..b7ca86bf 100644
--- a/flask_restx/model.py
+++ b/flask_restx/model.py
@@ -18,7 +18,7 @@
 from .mask import Mask
 from .errors import abort
 
-from jsonschema import Draft4Validator
+from jsonschema import Draft7Validator
 from jsonschema.exceptions import ValidationError
 
 from .utils import not_none
@@ -97,7 +97,7 @@ def inherit(cls, name, *parents):
         return model
 
     def validate(self, data, resolver=None, format_checker=None):
-        validator = Draft4Validator(
+        validator = Draft7Validator(
             self.__schema__, resolver=resolver, format_checker=format_checker
         )
         try:
diff --git a/flask_restx/schemas/__init__.py b/flask_restx/schemas/__init__.py
index d6dc2ac0..88e0c673 100644
--- a/flask_restx/schemas/__init__.py
+++ b/flask_restx/schemas/__init__.py
@@ -16,7 +16,7 @@
 except ImportError:
     # TODO Remove this to drop Python2 support
     from collections import Mapping
-from jsonschema import Draft4Validator
+from jsonschema import Draft7Validator
 
 from flask_restx import errors
 
@@ -55,7 +55,7 @@ class LazySchema(Mapping):
     .. versionadded:: 0.12.1
     """
 
-    def __init__(self, filename, validator=Draft4Validator):
+    def __init__(self, filename, validator=Draft7Validator):
         super(LazySchema, self).__init__()
         self.filename = filename
         self._schema = None