diff --git a/app/services/qualys_service.py b/app/services/qualys_service.py
index 2fab060..5b98ce8 100644
--- a/app/services/qualys_service.py
+++ b/app/services/qualys_service.py
@@ -634,9 +634,21 @@ def _refresh_all_agents_impl(db):
                         db.execute(text("UPDATE servers SET fqdn=:fqdn WHERE id=:sid AND (fqdn IS NULL OR fqdn='')"),
                                    {"fqdn": fqdn, "sid": server_id})
 
-                    existing = db.execute(text("SELECT id FROM qualys_assets WHERE qualys_asset_id=:qid"),
+                    existing = db.execute(text("SELECT id, updated_at FROM qualys_assets WHERE qualys_asset_id=:qid"),
                                           {"qid": int(asset_id)}).fetchone()
 
+                    # Skip si déjà mis à jour dans les 5 dernières minutes
+                    if existing and existing.updated_at:
+                        from datetime import datetime, timezone, timedelta
+                        try:
+                            age = (datetime.now(timezone.utc) - existing.updated_at).total_seconds()
+                            if age < 300:
+                                stats["skipped"] = stats.get("skipped", 0) + 1
+                                sp.commit()
+                                continue
+                        except Exception:
+                            pass
+
                     if existing:
                         db.execute(text("""UPDATE qualys_assets SET
                             name=:name, hostname=:hn, fqdn=:fqdn, ip_address=:ip, os=:os, os_family=:osf,