diff --git a/files/nats_registration_listener.py b/files/nats_registration_listener.py
index 76b3880..53a5ce4 100644
--- a/files/nats_registration_listener.py
+++ b/files/nats_registration_listener.py
@@ -43,7 +43,7 @@ NB_TOKEN = "7648e4f5ee370cda7834682e61b47c2ee8e95623"  # keep as provided
 NB_TIMEOUT = 3.0  # seconds per HTTP GET
 
 # Cache for MAC -> NetBox lookup result (seconds). Keeps NetBox load down under chatty devices.
-NB_LOOKUP_CACHE_TTL = float(os.environ.get("NB_LOOKUP_CACHE_TTL", "10.0"))
+NB_LOOKUP_CACHE_TTL = float(os.environ.get("NB_LOOKUP_CACHE_TTL", "60.0"))
 NB_LOOKUP_CACHE = {}  # mac_norm -> (expires_monotonic, cached_tuple)
 
 # =========================