diff --git a/home/models/site.py b/home/models/site.py
index 2ac18cd..4c3fefc 100644
--- a/home/models/site.py
+++ b/home/models/site.py
@@ -9,11 +9,13 @@ def expansion_from_gamebuild(gamebuild):
     los de WoW Classic: WotLK Classic 3.4.x (~44832–51536) y Cataclysm Classic
     4.4.x (~54332+). Nova WoW corre 3.4.3 (WotLK Classic), luego debe dar 'WotLK'.
     """
+    # WotLK Classic llega hasta 3.4.3 (build 54261); Cataclysm Classic empieza
+    # en 4.4.0 (build 54332) — están muy pegados, de ahí el corte en 54261.
     if gamebuild is None:
         return 'Unknown'
-    if gamebuild == 12340 or 44000 <= gamebuild <= 52000:
+    if gamebuild == 12340 or 44000 <= gamebuild <= 54261:
         return 'WotLK'
-    if gamebuild == 15595 or 53000 <= gamebuild <= 60000:
+    if gamebuild == 15595 or 54262 <= gamebuild <= 60000:
         return 'Cataclysm'
     return 'Unknown'