diff --git a/silkaj/cert.py b/silkaj/cert.py
index 9611d623f3a81cdbc8f34a6f7fbd249fd78b3e47..f193faf2d837abf78f72d707f85582580ee3b839 100644
--- a/silkaj/cert.py
+++ b/silkaj/cert.py
@@ -19,7 +19,7 @@ from click import command, argument, echo, confirm
 from time import time
 from tabulate import tabulate
 from duniterpy.api.bma import wot, blockchain
-from duniterpy.documents import block_uid, Identity, Certification
+from duniterpy.documents import BlockUID, block_uid, Identity, Certification
 
 from silkaj.auth import auth_method
 from silkaj.tools import convert_time, message_exit, coroutine