diff --git a/duniterpy/documents/transaction.py b/duniterpy/documents/transaction.py
index 8170988b1f09c8ee4a6e1ec1a376e5c2dd34fbf3..eac8edbf9a5a5272eb24211a63f8d307199cdde6 100644
--- a/duniterpy/documents/transaction.py
+++ b/duniterpy/documents/transaction.py
@@ -832,7 +832,7 @@ Comment: {comment}
             unlocks,
             outputs,
             comment,
-            time,
+            time=time,
             version=version,
         )
 
@@ -1000,7 +1000,7 @@ class SimpleTransaction(Transaction):
         unlocks: List[Unlock],
         outputs: List[OutputSource],
         comment: str,
-        time: int,
+        time: int = 0,
         signing_key: SigningKey = None,
         version: int = VERSION,
     ) -> None:
@@ -1016,7 +1016,7 @@ class SimpleTransaction(Transaction):
         :param unlocks: List of Unlock instances
         :param outputs: List of OutputSource instances
         :param comment: Comment field
-        :param time: time when the transaction enters the blockchain
+        :param time: time when the transaction enters the blockchain (default=0)
         :param signing_key: SigningKey instance to sign the document (default=None)
         :param version: Document version (default=transaction.VERSION)
         """
@@ -1029,7 +1029,7 @@ class SimpleTransaction(Transaction):
             unlocks,
             outputs,
             comment,
-            time,
+            time=time,
             signing_key=signing_key,
             version=version,
         )