diff --git a/mods/ENTITIES/mobs_mc/ender_dragon.lua b/mods/ENTITIES/mobs_mc/ender_dragon.lua
index c579213a0a..50b7819039 100644
--- a/mods/ENTITIES/mobs_mc/ender_dragon.lua
+++ b/mods/ENTITIES/mobs_mc/ender_dragon.lua
@@ -25,6 +25,7 @@ mobs:register_mob("mobs_mc:enderdragon", {
 	view_range = 35,
 	walk_velocity = 6,
 	run_velocity = 6,
+	can_despawn = false,
 	sounds = {
 		-- TODO: more sounds
 		shoot_attack = "mobs_mc_ender_dragon_shoot",
diff --git a/mods/ENTITIES/mobs_mc/wither.lua b/mods/ENTITIES/mobs_mc/wither.lua
index 28c1a2138c..8e90ddc159 100644
--- a/mods/ENTITIES/mobs_mc/wither.lua
+++ b/mods/ENTITIES/mobs_mc/wither.lua
@@ -43,6 +43,7 @@ mobs:register_mob("mobs_mc:wither", {
 	dogshoot_switch = 1,
 	dogshoot_count_max =1,
 	attack_animals = true,
+	can_despawn = false,
 	drops = {
 		{name = mobs_mc.items.nether_star,
 		chance = 1,