diff --git a/duniterpy/documents/ws2p/messages.py b/duniterpy/documents/ws2p/messages.py
index 9f45227e63c1c11770b89aa9fd73047351962f12..32b049ebf1c9e6d37ac66b027062fb21aff8dbf7 100644
--- a/duniterpy/documents/ws2p/messages.py
+++ b/duniterpy/documents/ws2p/messages.py
@@ -4,7 +4,7 @@ from typing import Optional, Any
 
 from duniterpy.documents import Document
 from duniterpy.key import VerifyingKey, SigningKey
-from duniterpy.helpers import get_ws2p_challenge
+from duniterpy.tools import get_ws2p_challenge
 
 
 class Connect(Document):