diff --git a/aiogram/types/base.py b/aiogram/types/base.py
index 1c8e6bf1..38c721c2 100644
--- a/aiogram/types/base.py
+++ b/aiogram/types/base.py
@@ -1,9 +1,9 @@
 import io
 import typing
-import ujson
 from typing import TypeVar
 
 from .fields import BaseField
+from ..utils import json
 from ..utils.context import get_value
 
 PROPS_ATTR_NAME = '_props'
@@ -165,7 +165,7 @@ class TelegramObject(metaclass=MetaTelegramObject):
         :return: JSON
         :rtype: :obj:`str`
         """
-        return ujson.dumps(self.to_python())
+        return json.dumps(self.to_python())
 
     @classmethod
     def create(cls, *args, **kwargs):
diff --git a/aiogram/utils/json.py b/aiogram/utils/json.py
index a83f3712..a5d214d7 100644
--- a/aiogram/utils/json.py
+++ b/aiogram/utils/json.py
@@ -1,16 +1,27 @@
+import json
+
 try:
-    import ujson as json
+    import ujson
 
-    IS_UJSON = True
+    _UJSON_IS_AVAILABLE = True
 except ImportError:
-    import json
+    _UJSON_IS_AVAILABLE = False
 
-    IS_UJSON = False
+_use_ujson = _UJSON_IS_AVAILABLE
+
+
+def disable_ujson():
+    global _use_ujson
+    _use_ujson = False
 
 
 def dumps(data):
+    if _use_ujson:
+        return ujson.dumps(data)
     return json.dumps(data)
 
 
 def loads(data):
+    if _use_ujson:
+        return ujson.loads(data)
     return json.loads(data)