diff --git a/app.py b/app.py
index 9805e20..09dc547 100644
--- a/app.py
+++ b/app.py
@@ -464,7 +464,7 @@ def clamp(n: float, lo: float = 0.0, hi: float = 100.0) -> float:
     return max(lo, min(hi, n))
 
 
-@lru_cache(max_size=1024)
+@lru_cache(maxsize=1024)
 def get_country_from_ip(ip):
     """
     Fetch country code for an IP using a public API.