diff --git a/spawners_mobs.lua b/spawners_mobs.lua
index 788c32e..df5dd8d 100644
--- a/spawners_mobs.lua
+++ b/spawners_mobs.lua
@@ -101,6 +101,7 @@ function spawners.create(mob_name, mod_prefix, size, offset, mesh, texture, nigh
 		tiles = {"spawners_spawner.png"},
 		is_ground_content = true,
 		groups = {cracky=1,level=2},
+		stack_max = 1,
 		on_construct = function(pos)
 			local random_pos, waiting = spawners.check_node_status(pos, mob_name, night_only)
 
diff --git a/spawners_ores.lua b/spawners_ores.lua
index 670add4..dd043ca 100644
--- a/spawners_ores.lua
+++ b/spawners_ores.lua
@@ -228,6 +228,7 @@ function spawners.create_ore(ore_name, mod_prefix, size, offset, texture, sound_
 		tiles = {"spawners_spawner.png"},
 		is_ground_content = true,
 		groups = {cracky=1,level=2},
+		stack_max = 1,
 		on_construct = function(pos)
 			local meta = minetest.get_meta(pos)
 			spawners.get_formspec(pos)