diff --git a/classes/Telegram-Bot/Base.php b/classes/Telegram-Bot/Base.php
index 8e7b5a9..8d6fedd 100644
--- a/classes/Telegram-Bot/Base.php
+++ b/classes/Telegram-Bot/Base.php
@@ -20,7 +20,7 @@ class Base
 	}
     public function msg($id, $msg)
     {
-        return $this->exec('sendMessage', array('chat_id' =>  $id, 'text' => $msg));
+        return $this->exec('sendMessage', array('chat_id' =>  $id, 'text' => $msg, 'disable_web_page_preview' => 1));
     }
 }
 
diff --git a/plugins/echo.php b/plugins/echo.php
index fa02cfb..24f2c00 100644
--- a/plugins/echo.php
+++ b/plugins/echo.php
@@ -1,5 +1,5 @@
 <?php
 PluginList("echo", "Echo what you typed.");
-if (preg_match("/^".TAG."echo (.*)$/", $text, $matches)) {
+if (preg_match("/^".preg_quote(TAG, '/')."echo (.*)$/", $text, $matches)) {
 	$BOT->msg($from, $matches[1]);
 }
\ No newline at end of file
diff --git a/plugins/help.php b/plugins/help.php
index 54829db..ed41660 100644
--- a/plugins/help.php
+++ b/plugins/help.php
@@ -1,6 +1,6 @@
 <?php
 PluginList("help", "Ask for help");
-if (preg_match("/^".TAG."help$/", $text)) {
+if (preg_match("/^".preg_quote(TAG, '/')."help$/", $text)) {
 	$plugin_list = HELP_BEGIN."\n";
 	foreach ($plugins as $value) {
 		$plugin_list .= "\n".$value;
diff --git a/plugins/ipto.php b/plugins/ipto.php
index f8bfeec..6f31578 100644
--- a/plugins/ipto.php
+++ b/plugins/ipto.php
@@ -1,6 +1,6 @@
 <?php
 PluginList("ipto", "Change the form of IP address");
-if (preg_match("/^".TAG."ipto (.*)$/", $text, $matches)) {
+if (preg_match("/^".preg_quote(TAG, '/')."ipto (.*)$/", $text, $matches)) {
 	$arr = explode('.',$matches[1]);
 	$msg = 'IP: '.$arr[0].'.'.$arr[1].'.'.$arr[2].'.'.$arr[3];
 	$msg .= "\nint: ".($arr[0] * pow(256,3) + $arr[1] * pow(256,2) + $arr[2] * 256 + $arr[3]);
diff --git a/plugins/trans.php b/plugins/trans.php
index 3958b3a..c53c318 100644
--- a/plugins/trans.php
+++ b/plugins/trans.php
@@ -1,6 +1,6 @@
 <?php
 PluginList("trans", "translate");
-if (preg_match("/^".TAG."trans (.*)$/", $text, $matches)) {
+if (preg_match("/^".preg_quote(TAG, '/')."trans (.*)$/", $text, $matches)) {
 	$matches = explode(" ", $matches[1], 2);
 	if (!isset($matches[1])) {
 		$to = "en";
diff --git a/plugins/tts.php b/plugins/tts.php
index b478c8f..b232e1f 100644
--- a/plugins/tts.php
+++ b/plugins/tts.php
@@ -1,6 +1,6 @@
 <?php
 PluginList("tts", "Text To Speech");
-if (preg_match("/^".TAG."tts (.*)$/", $text, $matches)) {
+if (preg_match("/^".preg_quote(TAG, '/')."tts (.*)$/", $text, $matches)) {
 	$mp3 = file_get_contents("http://tts.baidu.com/text2audio?lan=zh&ie=UTF-8&text=".urlencode($matches[1]));
 	$file = fopen($from.".mp3","w");
 	echo fwrite($file,$mp3);