diff --git a/README.txt b/README.txt
index a069982..220bb1d 100644
--- a/README.txt
+++ b/README.txt
@@ -5,11 +5,9 @@ License of source code:
 -----------------------
 Andrey's mod for minetest game
 
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+This mod is Free and Open Source Software, released under the LGPL 2.1 or later.
 
 http://www.gnu.org/licenses/lgpl-2.1.html
 
-Kick player out when curse word is said.
+Kick player out when he type curse word in chat or using /me or /msg command.
+Checks for some English and Russian curse words.
diff --git a/init.lua b/init.lua
index 969fad6..3ae2268 100644
--- a/init.lua
+++ b/init.lua
@@ -1,7 +1,9 @@
 -- Minetest 0.4.10+ mod: chat_anticurse
 -- punish player for cursing by disconnecting them
+--
+--  This mod is Free and Open Source Software, released under the LGPL 2.1 or later.
 -- 
--- See README.txt for licensing and other information.
+-- See README.txt for more information.
 
 chat_anticurse = {}
 chat_anticurse.simplemask = {}
@@ -48,7 +50,7 @@ chat_anticurse.check_message = function(name, message)
     local checkingmessage=string.lower( name.." "..message .." " )
 	local uncensored = 0
     for i=1, #chat_anticurse.simplemask do
-        if string.find(checkingmessage, chat_anticurse.simplemask[i], 1, plain) ~=nil then
+        if string.find(checkingmessage, chat_anticurse.simplemask[i], 1, true) ~=nil then
             uncensored = 2
             break
         end
@@ -56,9 +58,9 @@ chat_anticurse.check_message = function(name, message)
     
     --additional checks
     if 
-        string.find(checkingmessage, " c"..x3.."" .. "m ", 1, plain) ~=nil and 
-        not (string.find(checkingmessage, " c"..x3.."" .. "m " .. "se", 1, plain) ~=nil) and
-        not (string.find(checkingmessage, " c"..x3.."" .. "m " .. "to", 1, plain) ~=nil)
+        string.find(checkingmessage, " c"..x3.."" .. "m ", 1, true) ~=nil and 
+        not (string.find(checkingmessage, " c"..x3.."" .. "m " .. "se", 1, true) ~=nil) and
+        not (string.find(checkingmessage, " c"..x3.."" .. "m " .. "to", 1, true) ~=nil)
     then
         uncensored = 2
     end