diff --git a/README.md b/README.md
index e353550..fae4769 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ Change log:
 - 3.0 - Added PlayerFactions support, 'protector_hud_interval' setting and listing in advanced settings for mod values.
 - 3.1 - Ability to hide protection blocks using /protector_hide and /protector_show , italian local added (thanks Hamlet)
 - 3.2 - Defaults to Minetest translation if found, otherwise intllib fallback if loaded, locale files updated for both.  Added 'protector_msg' setting for player text.
-- 3.3 - Added support for playerfactions new api (thanks louisroyer)
+- 3.3 - Added support for playerfactions new api (thanks louisroyer), added limiter to protection radius of 22.
 
 Lucky Blocks: 10
 
diff --git a/hud.lua b/hud.lua
index 9b78afa..e33901e 100644
--- a/hud.lua
+++ b/hud.lua
@@ -1,6 +1,10 @@
 
 local S = protector.intllib
 local radius = (tonumber(minetest.setting_get("protector_radius")) or 5)
+
+-- radius limiter (minetest cannot handle node volume of more than 4096000)
+if radius > 22 then radius = 22 end
+
 local hud = {}
 local hud_timer = 0
 local hud_interval = (tonumber(minetest.setting_get("protector_hud_interval")) or 5)
diff --git a/init.lua b/init.lua
index 3cb1ca3..7e0f76c 100644
--- a/init.lua
+++ b/init.lua
@@ -34,6 +34,10 @@ local protector_show = tonumber(minetest.settings:get("protector_show_interval")
 local protector_recipe = minetest.settings:get_bool("protector_recipe") ~= false
 local protector_msg = minetest.settings:get_bool("protector_msg") ~= false
 
+-- radius limiter (minetest cannot handle node volume of more than 4096000)
+if protector_radius > 22 then protector_radius = 22 end
+
+
 -- get static spawn position
 local statspawn = minetest.string_to_pos(minetest.settings:get("static_spawnpoint"))
 		or {x = 0, y = 2, z = 0}
diff --git a/settingtypes.txt b/settingtypes.txt
index aea796b..7fe8446 100644
--- a/settingtypes.txt
+++ b/settingtypes.txt
@@ -1,5 +1,5 @@
 #    Size of protected area around protection node limiting player interaction
-protector_radius (Protector Radius) int 5
+protector_radius (Protector Radius [max 22]) int 5
 
 #    Flips player around when accessing protected area to stop lag griefing
 protector_flip (Protector Flip) bool false
diff --git a/tool.lua b/tool.lua
index a102dac..14570a6 100644
--- a/tool.lua
+++ b/tool.lua
@@ -6,6 +6,9 @@ local S = protector.intllib
 -- get protection radius
 local r = tonumber(minetest.settings:get("protector_radius")) or 5
 
+-- radius limiter (minetest cannot handle node volume of more than 4096000)
+if r > 22 then r = 22 end
+
 minetest.register_craftitem("protector:tool", {
 	description = S("Protector Placer Tool (stand near protector, face direction and use)"),
 	inventory_image = "protector_display.png^protector_logo.png",