diff --git a/src/field/arena.ts b/src/field/arena.ts
index afb202ecd23..3cbef659d7a 100644
--- a/src/field/arena.ts
+++ b/src/field/arena.ts
@@ -707,7 +707,7 @@ export class Arena {
       case Biome.METROPOLIS:
         return 141.470;
       case Biome.FOREST:
-        return 2.590;
+        return 0.341;
       case Biome.SEA:
         return 0.024;
       case Biome.SWAMP: