diff --git a/src/main.lua b/src/main.lua
index d6b7d64..619832f 100644
--- a/src/main.lua
+++ b/src/main.lua
@@ -42,7 +42,7 @@ local biomes = {
   },
   [5] = {
     name = "ice",
-    altitude = {min = 0, max = 1},
+    altitude = {min = 0.2, max = 1},
     temperature = {min = 0, max = 0.1},
     humidity = {min = 0.1, max = 1},
     color = {1, 1, 1, 1},