diff --git a/api.py b/api.py
index 7f0f342..4bfea6b 100644
--- a/api.py
+++ b/api.py
@@ -1098,7 +1098,7 @@ def creer_article(article: ArticleCreateRequest):
     - 500: Erreur Sage
     """
     try:
-        resultat = sage_client.creer_article(article.dict(exclude_none=True))
+        resultat = sage_client.creer_article(article.dict(exclude_unset=True))
         
         logger.info(f"✅ Article créé: {resultat.get('reference')}")
         
@@ -1137,7 +1137,7 @@ def modifier_article(reference: str, article: ArticleUpdateRequest):
     """
     try:
         # Filtrer les champs None
-        article_data = article.dict(exclude_none=True)
+        article_data = article.dict(exclude_unset=True)
         
         if not article_data:
             raise HTTPException(