diff --git a/shadowsocks-libev.sh b/shadowsocks-libev.sh
index ab1d463..5dc208a 100644
--- a/shadowsocks-libev.sh
+++ b/shadowsocks-libev.sh
@@ -2,7 +2,7 @@
 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
 export PATH
 #===============================================================================================
-#   System Required:  CentOS5.x (32bit/64bit) or CentOS6.x (32bit/64bit)
+#   System Required:  CentOS6.x (32bit/64bit)
 #   Description:  Install Shadowsocks(libev) for CentOS
 #   Author: Teddysun <i@teddysun.com>
 #   Intro:  http://teddysun.com/357.html
@@ -10,7 +10,7 @@ export PATH
 
 clear
 echo "#############################################################"
-echo "# Install Shadowsocks(libev) for CentOS5.x (32bit/64bit) or CentOS6.x (32bit/64bit)"
+echo "# Install Shadowsocks(libev) for CentOS6.x (32bit/64bit)"
 echo "# Intro: http://teddysun.com/357.html"
 echo "#"
 echo "# Author: Teddysun <i@teddysun.com>"
diff --git a/shadowsocks-nodejs.sh b/shadowsocks-nodejs.sh
index 4312040..9637964 100644
--- a/shadowsocks-nodejs.sh
+++ b/shadowsocks-nodejs.sh
@@ -2,7 +2,7 @@
 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
 export PATH
 #===============================================================================================
-#   System Required:  CentOS5.x (32bit/64bit) or CentOS6.x (32bit/64bit)
+#   System Required:  CentOS6.x (32bit/64bit)
 #   Description:  Install Shadowsocks(Nodejs) for CentOS
 #   Author: Teddysun <i@teddysun.com>
 #   Intro:  http://teddysun.com/355.html
@@ -10,7 +10,7 @@ export PATH
 
 clear
 echo "#############################################################"
-echo "# Install Shadowsocks(Nodejs) for CentOS5.x (32bit/64bit) or CentOS6.x (32bit/64bit)"
+echo "# Install Shadowsocks(Nodejs) for CentOS6.x (32bit/64bit)"
 echo "# Intro: http://teddysun.com/355.html"
 echo "#"
 echo "# Author: Teddysun <i@teddysun.com>"
diff --git a/shadowsocks.sh b/shadowsocks.sh
index 162cdc1..8b37e3a 100644
--- a/shadowsocks.sh
+++ b/shadowsocks.sh
@@ -2,7 +2,7 @@
 PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
 export PATH
 #===============================================================================================
-#   System Required:  CentOS5.x (32bit/64bit) or CentOS6.x (32bit/64bit)
+#   System Required:  CentOS6.x (32bit/64bit)
 #   Description:  Install Shadowsocks(Python) for CentOS
 #   Author: Teddysun <i@teddysun.com>
 #   Intro:  http://teddysun.com/342.html
@@ -10,7 +10,7 @@ export PATH
 
 clear
 echo "#############################################################"
-echo "# Install Shadowsocks(Python) for CentOS5.x (32bit/64bit) or CentOS6.x (32bit/64bit)"
+echo "# Install Shadowsocks(Python) for CentOS6.x (32bit/64bit)"
 echo "# Intro: http://teddysun.com/342.html"
 echo "#"
 echo "# Author: Teddysun <i@teddysun.com>"