diff --git a/README.md b/README.md
index 8e9b72d..01e6ff9 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ Du benötigst **Lua 5.2+**, eine aktive **Redis-Instanz** und die folgenden **Lu
 * luasocket
 * luasec
 * multipart-post
-* dkjson
+* lua-cjson
 * lpeg
 * redis-lua
 * fakeredis
diff --git a/miku/bot.lua b/miku/bot.lua
index 90e6c1d..2d13ddf 100644
--- a/miku/bot.lua
+++ b/miku/bot.lua
@@ -93,6 +93,10 @@ function bot:on_msg_receive(msg, config) -- The fn run whenever a message is rec
 	end
 	msg = pre_process_msg(self, msg, config)
 	
+	if is_service_msg(msg) then
+	  msg = service_modify_msg(msg)
+	end
+	
 	for _, plugin in ipairs(self.plugins) do
 	  match_plugins(self, msg, config, plugin)
 	end
diff --git a/miku/plugins/afk.lua b/miku/plugins/afk.lua
index 8811d85..171e0b0 100644
--- a/miku/plugins/afk.lua
+++ b/miku/plugins/afk.lua
@@ -84,9 +84,9 @@ function afk:pre_process(msg, self)
 	  redis:hset(hash, 'afk_text', false)
 	  local afk_text = afk_text:gsub("%*","")
 	  local afk_text = afk_text:gsub("_","")
-	  utilities.send_message(self, msg.chat.id, user_name..' ist wieder da! (war: *'..afk_text..'* für '..duration..')', true, nil, true)
+	  utilities.send_reply(self, msg, user_name..' ist wieder da! (war: *'..afk_text..'* für '..duration..')', true, '{"hide_keyboard":true,"selective":true}')
 	else
-	  utilities.send_message(self, msg.chat.id, user_name..' ist wieder da! (war '..duration..' weg)')
+	  utilities.send_reply(self, msg, user_name..' ist wieder da! (war '..duration..' weg)', false, '{"hide_keyboard":true,"selective":true}')
 	end
   end
   
@@ -103,8 +103,15 @@ function afk:action(msg)
   local chat_id = msg.chat.id
   local user_name = get_name(msg)
   local timestamp = msg.date
+  local uhash = 'user:'..msg.from.id
+  local show_afk_keyboard = redis:hget(uhash, 'afk_keyboard')
+  if show_afk_keyboard == 'true' then
+    keyboard = '{"keyboard":[[{"text":"Wieder da."}]], "one_time_keyboard":true, "selective":true, "resize_keyboard":true}'
+  else
+    keyboard = nil
+  end
   
-  utilities.send_reply(self, msg, afk:switch_afk(user_name, user_id, chat_id, timestamp, matches[2]))
+  utilities.send_reply(self, msg, afk:switch_afk(user_name, user_id, chat_id, timestamp, matches[2]), false, keyboard)
 end
 
 return afk
\ No newline at end of file
diff --git a/miku/plugins/echo.lua b/miku/plugins/echo.lua
index 0c9abef..fb07e67 100644
--- a/miku/plugins/echo.lua
+++ b/miku/plugins/echo.lua
@@ -13,7 +13,7 @@ function echo:init(config)
 end
 
 function echo:inline_callback(inline_query, config, matches)
-  local text = matches[1]  
+  local text = matches[1]
   local results = '['
 
   -- enable custom markdown button
diff --git a/miku/plugins/games.lua b/miku/plugins/games.lua
index cf7952f..c421773 100644
--- a/miku/plugins/games.lua
+++ b/miku/plugins/games.lua
@@ -122,9 +122,17 @@ function games:send_game_data(game_id, self, msg)
   return
 end
 
+function games:action(msg, config)
+  local game = utilities.input(msg.text)
+  if not game then
+    if msg.reply_to_message and msg.reply_to_message.text then
+      game = msg.reply_to_message.text
+    else
+	  utilities.send_message(self, msg.chat.id, fun.doc, true, msg.message_id, true)
+	  return
+	end
+  end
 
-function games:action(msg, config, matches)
-  local game = URL.escape(matches[1])
   local game_id = games:get_game_id(game)
   if not game_id then
     utilities.send_reply(self, msg, 'Spiel nicht gefunden!')
diff --git a/miku/plugins/getfile.lua b/miku/plugins/getfile.lua
index 77d0446..a82aa28 100644
--- a/miku/plugins/getfile.lua
+++ b/miku/plugins/getfile.lua
@@ -104,4 +104,4 @@ end
 function media_download:action(msg)
 end
 
-return media_download
+return media_download
\ No newline at end of file
diff --git a/miku/plugins/leave_group.lua b/miku/plugins/leave_group.lua
deleted file mode 100644
index 532d6db..0000000
--- a/miku/plugins/leave_group.lua
+++ /dev/null
@@ -1,49 +0,0 @@
-local leave_group = {}
-
-leave_group.triggers = {
-  '/nil'
-}
-
-local report_to_admin = true -- set to false to not be notified, when Bot leaves groups without you
-
-function leave_group:check_for_admin(msg, self, config)
-  local result = bindings.request(self, 'getChatMember', {
-		chat_id = msg.chat.id,
-		user_id = config.admin
-	} )
-  if not result.ok then
-    print('Konnte nicht prüfen, ob Admin in Gruppe ist. Verlasse Gruppe.')
-	return false
-  end
-  if result.result.status ~= "member" and result.result.status ~= "administrator" and result.result.status ~= "creator" then
-    return false
-  else
-    return true
-  end
-end
-
-function leave_group:pre_process(msg, self, config)
-  if msg.group_chat_created or msg.new_chat_member then
-    local admin_in_group = leave_group:check_for_admin(msg, self, config)
-	if not admin_in_group then
-	  print('Admin ist nicht in der Gruppe, verlasse sie deshalb...')
-	  utilities.send_reply(self, msg, 'Dieser Bot wurde in eine fremde Gruppe hinzugefügt. Dies wird gemeldet!\nThis bot was added to foreign group. This incident will be reported!')
-      local result = bindings.request(self, 'leaveChat', {
-		chat_id = msg.chat.id
-	  } )
-	  local chat_name = msg.chat.title
-	  local chat_id = msg.chat.id
-	  local from = msg.from.name
-	  local from_id = msg.from.id
-	  if report_to_admin then
-	    utilities.send_message(self, config.admin, '#WARNUNG: Bot wurde in fremde Gruppe hinzugefügt:\nGruppenname: '..chat_name..' ('..chat_id..')\nHinzugefügt von: '..from..' ('..from_id..')')
-	  end
-	end
-  end
-  return msg
-end
-
-function leave_group:action(msg)
-end
-
-return leave_group
diff --git a/miku/plugins/remind.lua b/miku/plugins/remind.lua
index e691d83..01575f5 100644
--- a/miku/plugins/remind.lua
+++ b/miku/plugins/remind.lua
@@ -11,54 +11,56 @@ function remind:init(config)
 end
 
 function remind:action(msg)
-	-- Ensure there are arguments. If not, send doc.
-	local input = utilities.input(msg.text)
-	if not input then
-		utilities.send_message(self, msg.chat.id, remind.doc, true, msg.message_id, true)
-		return
-	end
-	-- Ensure first arg is a number. If not, send doc.
-	local duration = utilities.get_word(input, 1)
-	if not tonumber(duration) then
-		utilities.send_message(self, msg.chat.id, remind.doc, true, msg.message_id, true)
-		return
-	end
-	-- Duration must be between one minute and one year (approximately).
-	duration = tonumber(duration)
-	if duration < 1 then
-		duration = 1
-	elseif duration > 526000 then
-		duration = 526000
-	end
-	-- Ensure there is a second arg.
-	local message = utilities.input(input)
-	if not message then
-		utilities.send_message(self, msg.chat.id, remind.doc, true, msg.message_id, true)
-		return
-	end
-	-- Make a database entry for the group/user if one does not exist.
-	self.database.reminders[msg.chat.id_str] = self.database.reminders[msg.chat.id_str] or {}
-	-- Limit group reminders to 10 and private reminders to 50.
-	if msg.chat.type ~= 'private' and utilities.table_size(self.database.reminders[msg.chat.id_str]) > 9 then
-		utilities.send_reply(self, msg, 'Diese Gruppe hat schon zehn Erinnerungen!')
-		return
-	elseif msg.chat.type == 'private' and utilities.table_size(self.database.reminders[msg.chat.id_str]) > 49 then
-		utilities.send_reply(msg, 'Du hast schon 50 Erinnerungen!')
-		return
-	end
-	-- Put together the reminder with the expiration, message, and message to reply to.
-	local reminder = {
-		time = os.time() + duration * 60,
-		message = message
-	}
-	table.insert(self.database.reminders[msg.chat.id_str], reminder)
-	local output = 'Ich werde dich in ' .. duration
-	if duration == 1 then
-		output = output .. ' Minute erinnern!'
-	else
-		output = output .. ' Minuten erinnern!'
-	end
-	utilities.send_reply(self, msg, output)
+  -- Ensure there are arguments. If not, send doc.
+  local input = utilities.input(msg.text)
+  if not input then
+	utilities.send_message(self, msg.chat.id, remind.doc, true, msg.message_id, true)
+	return
+  end
+
+  -- Ensure first arg is a number. If not, send doc.
+  local duration = utilities.get_word(input, 1)
+  if not tonumber(duration) then
+	utilities.send_message(self, msg.chat.id, remind.doc, true, msg.message_id, true)
+	return
+  end
+
+  -- Duration must be between one minute and one day (approximately).
+  duration = tonumber(duration)
+  if duration < 1 then
+	duration = 1
+  elseif duration > 1440 then
+	duration = 1440
+  end
+
+  -- Ensure there is a second arg.
+  local message = utilities.input(input)
+  if not message then
+	utilities.send_message(self, msg.chat.id, remind.doc, true, msg.message_id, true)
+	return
+  end
+ 
+  -- Make a database entry for the group/user if one does not exist.
+  self.database.reminders[msg.chat.id_str] = self.database.reminders[msg.chat.id_str] or {}
+  -- Limit group reminders to 10 and private reminders to 50.
+  if msg.chat.type ~= 'private' and utilities.table_size(self.database.reminders[msg.chat.id_str]) > 9 then
+	utilities.send_reply(self, msg, 'Diese Gruppe hat schon zehn Erinnerungen!')
+	return
+  elseif msg.chat.type == 'private' and utilities.table_size(self.database.reminders[msg.chat.id_str]) > 49 then
+	utilities.send_reply(msg, 'Du hast schon 50 Erinnerungen!')
+	return
+  end
+
+  -- Put together the reminder with the expiration, message, and message to reply to.
+  local timestamp = os.time() + duration * 60
+  local reminder = {
+	time = timestamp,
+	message = message
+  }
+  table.insert(self.database.reminders[msg.chat.id_str], reminder)
+  local human_readable_time = convert_timestamp(timestamp, '%H:%M:%S')
+  local output = 'Ich werde dich um *'..human_readable_time..' Uhr* erinnern.'
+  utilities.send_reply(self, msg, output, true)
 end
 
 function remind:cron()
diff --git a/miku/plugins/entergroup.lua b/miku/plugins/service_entergroup.lua
similarity index 80%
rename from miku/plugins/entergroup.lua
rename to miku/plugins/service_entergroup.lua
index 7423d82..2a05844 100644
--- a/miku/plugins/entergroup.lua
+++ b/miku/plugins/service_entergroup.lua
@@ -1,7 +1,8 @@
 local entergroup = {}
 
 entergroup.triggers = {
-  '/nil'
+  '^//tgservice (new_chat_member)$',
+  '^//tgservice (left_chat_member)$'
 }
 
 function entergroup:chat_new_user(msg, self)
@@ -38,17 +39,14 @@ function entergroup:chat_del_user(msg, self)
   utilities.send_reply(self, msg, text, true)
 end
 
-function entergroup:pre_process(msg, self)
-  if msg.new_chat_member then
+function entergroup:action(msg, config, matches)
+  if not is_service_msg(msg) then return end -- Bad attempt at trolling!
+  
+  if matches[1] == 'new_chat_member' then
     entergroup:chat_new_user(msg, self)
-  elseif msg.left_chat_member then
+  elseif matches[1] == 'left_chat_member'then
     entergroup:chat_del_user(msg, self)
   end
-
-  return msg
 end
 
-function entergroup:action(msg)
-end
-
-return entergroup
+return entergroup
\ No newline at end of file
diff --git a/miku/plugins/service_leave_group.lua b/miku/plugins/service_leave_group.lua
new file mode 100644
index 0000000..f8ae1a7
--- /dev/null
+++ b/miku/plugins/service_leave_group.lua
@@ -0,0 +1,45 @@
+local leave_group = {}
+
+leave_group.triggers = {
+  '^//tgservice group_chat_created$',
+  '^//tgservice supergroup_chat_created$'
+}
+
+local report_to_admin = true -- set to false to not be notified, when Bot leaves groups without you
+
+function leave_group:check_for_admin(msg, self, config)
+  local result = bindings.request(self, 'getChatMember', {
+		chat_id = msg.chat.id,
+		user_id = config.admin
+	} )
+  if not result.ok then
+    print('Konnte nicht pr�fen, ob Admin in Gruppe ist! Verlasse sie sicherheitshalber...')
+	return false
+  end
+  if result.result.status ~= "member" and result.result.status ~= "administrator" and result.result.status ~= "creator" then
+    return false
+  else
+    return true
+  end
+end
+
+function leave_group:action(msg, config)
+  if not is_service_msg(msg) then return end -- Bad attempt at trolling!
+  local admin_in_group = leave_group:check_for_admin(msg, self, config)
+  if not admin_in_group then
+	print('Admin ist nicht in der Gruppe, verlasse sie deshalb...')
+	utilities.send_reply(self, msg, 'Dieser Bot wurde in eine fremde Gruppe hinzugef�gt. Dies wird gemeldet!\nThis bot was added to foreign group. This incident will be reported!')
+	local result = bindings.request(self, 'leaveChat', {
+	  chat_id = msg.chat.id
+	} )
+	local chat_name = msg.chat.title
+	local chat_id = msg.chat.id
+	local from = msg.from.name
+	local from_id = msg.from.id
+	if report_to_admin then
+	  utilities.send_message(self, config.admin, '#WARNUNG: Bot wurde in fremde Gruppe hinzugef�gt:\nGruppenname: '..chat_name..' ('..chat_id..')\nHinzugef�gt von: '..from..' ('..from_id..')')
+	end
+  end
+end
+
+return leave_group
\ No newline at end of file
diff --git a/miku/plugins/settings.lua b/miku/plugins/settings.lua
new file mode 100644
index 0000000..b8a6f17
--- /dev/null
+++ b/miku/plugins/settings.lua
@@ -0,0 +1,54 @@
+local settings = {}
+
+settings.triggers = {
+  "^(⚙ [Ee]instellungen)$",
+  "^(/settings)$",
+  "^(💤 [Aa][Ff][Kk]%-[Kk]eyboard einschalten)",
+  "^(💤 [Aa][Ff][Kk]%-[Kk]eyboard ausschalten)",
+  "^(❌ [Ee]instellungen verstecken)"
+}
+
+--[[
+[
+  [ "Top Left", "Top Right" ],
+  [ "Bottom Left", "Bottom Right" ]
+]
+]]
+
+function settings:keyboard(user_id)
+  if redis:hget('user:'..user_id, 'afk_keyboard') == 'true' then
+    afk_button = '{"text":"💤 AFK-Keyboard ausschalten"}'
+  else
+    afk_button = '{"text":"💤 AFK-Keyboard einschalten"}'
+  end
+  local hide_settings_button = '{"text":"❌ Einstellungen verstecken"}'
+  
+  local settings_keyboard = '[['..afk_button..','..hide_settings_button..']]'
+  return settings_keyboard
+end
+
+function settings:action(msg, config, matches)
+  if msg.chat.type ~= "private" then
+    return
+  end
+  
+  local hash = 'user:'..msg.from.id
+
+  if matches[1] == '⚙ Einstellungen' or matches[1] == '/settings' then
+    utilities.send_reply(self, msg, 'Was möchtest du einstellen?', false, '{"keyboard":'..settings:keyboard(msg.from.id)..', "one_time_keyboard":true, "selective":true, "resize_keyboard":true}')
+	return
+  elseif matches[1] == '💤 AFK-Keyboard einschalten' then
+    redis:hset(hash, 'afk_keyboard', 'true')
+	utilities.send_reply(self, msg, 'Das AFK-Keyboard wurde erfolgreich *eingeschaltet*.', true, '{"keyboard":'..settings:keyboard(msg.from.id)..', "one_time_keyboard":true, "selective":true, "resize_keyboard":true}')
+	return
+  elseif matches[1] == '💤 AFK-Keyboard ausschalten' then
+    redis:hset(hash, 'afk_keyboard', 'false')
+	utilities.send_reply(self, msg, 'Das AFK-Keyboard wurde erfolgreich *ausgeschaltet*.', true, '{"keyboard":'..settings:keyboard(msg.from.id)..', "one_time_keyboard":true, "selective":true, "resize_keyboard":true}')
+	return
+  elseif matches[1] == '❌ Einstellungen verstecken' then
+	utilities.send_reply(self, msg, 'Um die Einstellungen wieder einzublenden, führe /settings aus.', true, '{"hide_keyboard":true}')
+	return
+  end
+end
+
+return settings
\ No newline at end of file
diff --git a/miku/plugins/stats.lua b/miku/plugins/stats.lua
index 3ba40bd..869ad76 100644
--- a/miku/plugins/stats.lua
+++ b/miku/plugins/stats.lua
@@ -80,9 +80,9 @@ end
 
 function stats:pre_process(msg, self)
   -- Ignore service msg
-  if msg.service then -- check how Bot API handles service msgs, will update this
+  if is_service_msg(msg) then
     print('Service message')
-    return
+    return msg
   end
 
   if msg.left_chat_member then
diff --git a/miku/plugins/surrogate.lua b/miku/plugins/surrogate.lua
index 2b52d94..e627c09 100644
--- a/miku/plugins/surrogate.lua
+++ b/miku/plugins/surrogate.lua
@@ -2,13 +2,17 @@ local surrogate = {}
 
 surrogate.triggers = {
   "^/s (%-%d+) +(.+)$",
-  "^/s (%d+) +(.+)$"
+  "^/s (%d+) +(.+)$",
+  "^/s (@[A-Za-z0-9-_-.-._.]+) +(.+)"
 }
 
-function surrogate:action(msg)
-  -- Supergroups don't work!?
+function surrogate:action(msg, config, matches)
+  if not is_sudo(msg, config) then
+    utilities.send_reply(self, msg, config.errors.sudo)
+	return
+  end
   utilities.send_message(self, matches[1], matches[2], true, nil, true)
   return
 end
 
-return surrogate
+return surrogate
\ No newline at end of file
diff --git a/miku/redis-old.lua b/miku/redis-old.lua
deleted file mode 100644
index 6bdf76f..0000000
--- a/miku/redis-old.lua
+++ /dev/null
@@ -1,39 +0,0 @@
-local Redis = require 'redis' local FakeRedis = require 'fakeredis' 
-local params = {
-  host = os.getenv('REDIS_HOST') or '127.0.0.1',
-  port = tonumber(os.getenv('REDIS_PORT') or 6379)
-}
-local database = os.getenv('REDIS_DB') local password = 
-os.getenv('REDIS_PASSWORD') -- Overwrite HGETALL Redis.commands.hgetall 
-= Redis.command('hgetall', {
-  response = function(reply, command, ...)
-    local new_reply = { }
-    for i = 1, #reply, 2 do new_reply[reply[i]] = reply[i + 1] end
-    return new_reply
-  end
-})
-local redis = nil -- Won't launch an error if fails local ok = 
-pcall(function()
-  redis = Redis.connect(params) end) if not ok then
-  local fake_func = function()
-    print('\27[31mCan\'t connect with Redis, install/configure 
-it!\27[39m')
-  end
-  fake_func()
-  fake = FakeRedis.new()
-  print('\27[31mRedis addr: '..params.host..'\27[39m')
-  print('\27[31mRedis port: '..params.port..'\27[39m')
-  redis = setmetatable({fakeredis=true}, {
-  __index = function(a, b)
-    if b ~= 'data' and fake[b] then
-      fake_func(b)
-    end
-    return fake[b] or fake_func
-  end }) else
-  if password then
-    redis:auth(password)
-  end
-  if database then
-    redis:select(database)
-  end end
-return redis
diff --git a/miku/utilities.lua b/miku/utilities.lua
index 7f58285..09dd337 100644
--- a/miku/utilities.lua
+++ b/miku/utilities.lua
@@ -8,7 +8,7 @@ http = require('socket.http')
 https = require('ssl.https')
 socket = require('socket')
 URL = require('socket.url')
-json = require('dkjson')
+json = require('cjson')
 serpent = require("serpent")
 bindings = require('miku.bindings')
 redis = (loadfile "./miku/redis.lua")()
@@ -254,12 +254,12 @@ function utilities.trim(str)
 	return s
 end
 
--- Retruns true if the string is empty
+-- Returns true if the string is empty
 function string:isempty()
   return self == nil or self == ''
 end
 
--- Retruns true if the string is blank
+-- Returns true if the string is blank
 function string:isblank()
   self = self:trim()
   return self:isempty()
@@ -631,6 +631,62 @@ function is_sudo(msg, config)
   return var
 end
 
+function service_modify_msg(msg)
+  if msg.new_chat_member then
+	msg.text = '//tgservice new_chat_member'
+	msg.text_lower = msg.text
+  elseif msg.left_chat_member then
+	msg.text = '//tgservice left_chat_member'
+	msg.text_lower = msg.text
+  elseif msg.new_chat_title then
+	msg.text = '//tgservice new_chat_title'
+	msg.text_lower = msg.text
+  elseif msg.new_chat_photo then
+	msg.text = '//tgservice new_chat_photo'
+	msg.text_lower = msg.text
+  elseif msg.group_chat_created then
+	msg.text = '//tgservice group_chat_created'
+	msg.text_lower = msg.text
+  elseif msg.supergroup_chat_created then
+	msg.text = '//tgservice supergroup_chat_created'
+	msg.text_lower = msg.text
+  elseif msg.channel_chat_created then
+	msg.text = '//tgservice channel_chat_created'
+	msg.text_lower = msg.text
+  elseif msg.migrate_to_chat_id then
+	msg.text = '//tgservice migrate_to_chat_id'
+	msg.text_lower = msg.text
+  elseif msg.migrate_from_chat_id then
+	msg.text = '//tgservice migrate_from_chat_id'
+	msg.text_lower = msg.text
+  end
+  return msg
+end
+
+function is_service_msg(msg)
+  local var = false
+  if msg.new_chat_member then
+    var = true
+  elseif msg.left_chat_member then
+    var = true
+  elseif msg.new_chat_title then
+    var = true
+  elseif msg.new_chat_photo then
+    var = true
+  elseif msg.group_chat_created then
+    var = true
+  elseif msg.supergroup_chat_created then
+    var = true
+  elseif msg.channel_chat_created then
+    var = true
+  elseif msg.migrate_to_chat_id then
+    var = true
+  elseif msg.migrate_from_chat_id then
+    var = true
+  end
+  return var
+end
+
 function post_petition(url, arguments, headers)
    local url, h = string.gsub(url, "http://", "")
    local url, hs = string.gsub(url, "https://", "")
@@ -794,20 +850,62 @@ function get_http_header(url)
   return header, code
 end
 
+-- checks with If-Modified-Since header, if url has been changed
+-- URL and Last-Modified heder are required
+function was_modified_since(url, last_modified)
+  local doer = http
+  local do_redir = true
+  if url:match('^https') then
+	doer = https
+	do_redir = false
+  end
+  local _, code, header = doer.request {
+      url = url,
+      method = "HEAD",
+	  redirect = do_redir,
+      headers = {
+		["If-Modified-Since"] = last_modified
+	  }
+   }
+  if code == 304 then
+    return false, nil, code
+  else
+	if header["last-modified"] then
+	  new_last_modified = header["last-modified"]
+	elseif header["Last-Modified"] then
+	  new_last_modified = header["Last-Modified"]
+	end
+    return true, new_last_modified, code
+  end
+end
+
 -- only url is needed!
 function get_cached_file(url, file_name, receiver, chat_action, self)
   local hash = 'telegram:cache:sent_file'
   local cached_file_id = redis:hget(hash..':'..url, 'file_id')
   local cached_last_modified = redis:hget(hash..':'..url, 'last_modified')
 
+  if cached_last_modified then
+    was_modified, new_last_modified, code = was_modified_since(url, cached_last_modified)
+	if not was_modified then
+	  print('File wasn\'t modified, skipping download...')
+	  return cached_file_id, nil, true
+	else
+	  if code ~= 200 then
+		redis:del(hash..':'..url)
+		return
+	  end
+	  print('File was modified, redownloading...')
+	  if receiver and chat_action and self then
+	    utilities.send_typing(self, receiver, chat_action)
+	  end
+	  file = download_to_file(url, file_name)
+	  return file, new_last_modified, false
+	end
+  end
+
   -- get last-modified and Content-Length header
   local header, code = get_http_header(url)
-  if code ~= 200 then
-    if cached_file_id then
-      redis:del(hash..':'..url)
-	end
-    return
-  end
 
   -- file size limit is 50 MB
   if header["Content-Length"] then
@@ -839,14 +937,7 @@ function get_cached_file(url, file_name, receiver, chat_action, self)
   end
   
   if not nocache then
-    if last_modified == cached_last_modified then
-      print('File not modified and already cached')
-      nocache = true
-	  file = cached_file_id
-    else
-	  print('File cached, but modified or not already cached. (Re)downloading...')
-      file = download_to_file(url, file_name)
-    end
+    file = download_to_file(url, file_name)
   else
     print('No Last-Modified header!')
     file = download_to_file(url, file_name)
@@ -861,11 +952,23 @@ function makeHumanTime(totalseconds)
   local minutes = minutes % 60
   local hours = math.floor(totalseconds / 3600)
   if minutes == 00 and hours == 00 then
-    return seconds..' Sekunden'
+    if seconds == 1 then
+	  return seconds..' Sekunde'
+	else
+      return seconds..' Sekunden'
+	end
   elseif hours == 00 and minutes ~= 00 then
-    return string.format("%02d:%02d", minutes, seconds)..' Minuten'
+    if minutes == 1 then
+	  return string.format("%02d:%02d", minutes, seconds)..' Minute'
+	else
+      return string.format("%02d:%02d", minutes, seconds)..' Minuten'
+	end
   elseif hours ~= 00 then
-    return string.format("%02d:%02d:%02d", hours,  minutes, seconds)..' Stunden'
+    if hours == 1 then
+	  return string.format("%02d:%02d:%02d", hours,  minutes, seconds)..' Stunde'
+	else
+      return string.format("%02d:%02d:%02d", hours,  minutes, seconds)..' Stunden'
+	end
   end
 end