diff --git a/ikrpg.appcache b/ikrpg.appcache
index c878bf0..2e0ed9e 100644
--- a/ikrpg.appcache
+++ b/ikrpg.appcache
@@ -153,7 +153,7 @@ CACHE:
 # images
 /static/images/constellations/moons.jpg
 /static/images/constellations/shadow.png
-/static/images/maps/bases/medium/Longchops.jpg
+/static/images/maps/bases/medium/Longchops.png
 /static/images/maps/bases/small/Farrow-Brigand.png
 /static/images/maps/bases/small/Gullin.png
 /static/images/maps/bases/small/Knor.png