diff --git a/cavestuff/nodes.lua b/cavestuff/nodes.lua
index 002c8a1..018963c 100644
--- a/cavestuff/nodes.lua
+++ b/cavestuff/nodes.lua
@@ -15,7 +15,7 @@ minetest.register_node("cavestuff:pebble_1",{
 	tiles = {"undergrowth_pebble.png"},
 	paramtype = "light",
 	paramtype2 = "facedir",
-	groups = {cracky=3, stone=1, attached_node=1},
+	groups = {cracky=3, stone=1, attached_node=1, dig_immediate=3},
 	selection_box = cbox,
 	collision_box = cbox,
 	on_place = function(itemstack, placer, pointed_thing)
@@ -34,7 +34,7 @@ minetest.register_node("cavestuff:pebble_2",{
 	drop = "cavestuff:pebble_1",
 	paramtype = "light",
 	paramtype2 = "facedir",
-	groups = {cracky=3, stone=1, attached_node=1, not_in_creative_inventory=1},
+	groups = {cracky=3, stone=1, attached_node=1, not_in_creative_inventory=1, dig_immediate=3},
 	selection_box = cbox,
 	collision_box = cbox,
 	sounds = default.node_sound_stone_defaults(),
@@ -47,7 +47,7 @@ minetest.register_node("cavestuff:desert_pebble_1",{
 	 tiles = {"default_desert_stone.png"},
 	 paramtype = "light",
 	paramtype2 = "facedir",
-	 groups = {cracky=3, stone=1, attached_node=1},
+	 groups = {cracky=3, stone=1, attached_node=1, dig_immediate=3},
 	selection_box = cbox,
 	collision_box = cbox,
 	 on_place = function(itemstack, placer, pointed_thing)
@@ -66,7 +66,7 @@ minetest.register_node("cavestuff:desert_pebble_2",{
 	 tiles = {"default_desert_stone.png"},
 	 paramtype = "light",
 	paramtype2 = "facedir",
-	 groups = {cracky=3, stone=1, attached_node=1, not_in_creative_inventory=1},
+	 groups = {cracky=3, stone=1, attached_node=1, not_in_creative_inventory=1, dig_immediate=3},
 	selection_box = cbox,
 	collision_box = cbox,
 	 sounds = default.node_sound_stone_defaults(),