diff --git a/machines.lua b/machines.lua
index 9459e17..479aabe 100644
--- a/machines.lua
+++ b/machines.lua
@@ -150,7 +150,7 @@ local furnace_item = {
 	subgroup = "adamo-chemical-production-machine",
 	order = "c[adamo-blast-furnace]",
 	place_result = "adamo-blast-furnace",
-	stack_size = 25
+	stack_size = 50
 }
 local furnace_entity = {
 	type = "assembling-machine",