diff --git a/cuenca_validations/types/helpers.py b/cuenca_validations/types/helpers.py
index 9cd87452..6736fdd0 100644
--- a/cuenca_validations/types/helpers.py
+++ b/cuenca_validations/types/helpers.py
@@ -1,4 +1,5 @@
 import datetime as dt
+import random
 import uuid
 from base64 import urlsafe_b64encode
 from typing import Callable, Optional, Union
@@ -12,7 +13,10 @@
 
 def uuid_field(prefix: str = '') -> Callable[[], str]:
     def base64_uuid_func() -> str:
-        return prefix + urlsafe_b64encode(uuid.uuid4().bytes).decode()[:-2]
+        base64_str = urlsafe_b64encode(uuid.uuid4().bytes).decode()[:-2]
+        rnd = str(random.randint(0, 9))
+        sanitized = base64_str.replace('-', rnd).replace('_', rnd)
+        return prefix + sanitized
 
     return base64_uuid_func
 
diff --git a/cuenca_validations/version.py b/cuenca_validations/version.py
index 4afeab12..c6d8fc9b 100644
--- a/cuenca_validations/version.py
+++ b/cuenca_validations/version.py
@@ -1 +1 @@
-__version__ = '2.1.21'
+__version__ = '2.1.22'
diff --git a/tests/test_helpers.py b/tests/test_helpers.py
index 99791514..5c426244 100644
--- a/tests/test_helpers.py
+++ b/tests/test_helpers.py
@@ -27,3 +27,10 @@ def test_multiple_generators():
     assert uuid1.startswith('CA')
     assert uuid2.startswith('TR')
     assert uuid1 != uuid2
+
+
+def test_sanitized_uuid():
+    generator = uuid_field('US')
+    uuid_str = generator()
+    assert "-" not in uuid_str
+    assert "_" not in uuid_str