diff --git a/Server/furnace.txt b/Server/furnace.txt
index f77b790f3..96304b666 100644
--- a/Server/furnace.txt
+++ b/Server/furnace.txt
@@ -119,7 +119,7 @@ WetSponge        = Sponge
 ! TrappedChest    = 300    # -> 15 sec
 ! WhiteBanner     = 300    # -> 15 sec
 ! WoodAxe         = 200    # -> 10 sec
-! WoodenSlab      = 15     # -> 7.5 sec
+! WoodenSlab      = 150    # -> 7.5 sec
 ! WoodHoe         = 200    # -> 10 sec
 ! WoodPickaxe     = 200    # -> 10 sec
 ! WoodPlate       = 300    # -> 15 sec