diff --git a/installation/scripts/connect.sh b/installation/scripts/connect.sh
index 9c191a6..0d481ae 100644
--- a/installation/scripts/connect.sh
+++ b/installation/scripts/connect.sh
@@ -1,5 +1,15 @@
 #!/bin/bash
 . /etc/openvpn/scripts/config.sh
+. /etc/openvpn/scripts/functions.sh
+
+common_name=$(echap "$common_name")
+trusted_ip=$(echap "$trusted_ip")
+trusted_port=$(echap "$trusted_port")
+ifconfig_pool_remote_ip=$(echap "$ifconfig_pool_remote_ip")
+remote_port_1=$(echap "$remote_port_1")
+bytes_received=$(echap "$bytes_received")
+bytes_sent=$(echap "$bytes_sent")
+
 
 # We insert data in the log table
 mysql -h$HOST -P$PORT -u$USER -p$PASS $DB -e "INSERT INTO log (log_id, user_id, log_trusted_ip, log_trusted_port, log_remote_ip, log_remote_port, log_start_time, log_end_time, log_received, log_send) VALUES(NULL, '$common_name','$trusted_ip', '$trusted_port','$ifconfig_pool_remote_ip', '$remote_port_1', now(),'0000-00-00 00:00:00', '$bytes_received', '$bytes_sent')"
diff --git a/installation/scripts/disconnect.sh b/installation/scripts/disconnect.sh
index 963a0ea..300d446 100644
--- a/installation/scripts/disconnect.sh
+++ b/installation/scripts/disconnect.sh
@@ -1,5 +1,12 @@
 #!/bin/bash
 . /etc/openvpn/scripts/config.sh
+. /etc/openvpn/scripts/functions.sh
+
+common_name=$(echap "$common_name")
+bytes_received=$(echap "$bytes_received")
+bytes_sent=$(echap "$bytes_sent")
+trusted_ip=$(echap "$trusted_ip")
+trusted_port=$(echap "$trusted_port")
 
 # We specify the user is offline
 mysql -h$HOST -P$PORT -u$USER -p$PASS $DB -e "UPDATE user SET user_online=0 WHERE user_id='$common_name'"
diff --git a/installation/scripts/functions.sh b/installation/scripts/functions.sh
new file mode 100644
index 0000000..05402e8
--- /dev/null
+++ b/installation/scripts/functions.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+function echap() {
+  # echap ' and \
+  echo "$1" | sed s/\\\\/\\\\\\\\/g | sed s/\'/\\\\\'/g
+}
diff --git a/installation/scripts/login.sh b/installation/scripts/login.sh
index c79f9db..afc794c 100644
--- a/installation/scripts/login.sh
+++ b/installation/scripts/login.sh
@@ -1,5 +1,9 @@
 #!/bin/bash
 . /etc/openvpn/scripts/config.sh
+. /etc/openvpn/scripts/functions.sh
+
+username=$(echap "$username")
+password=$(echap "$password")
 
 # Authentication
 user_pass=$(mysql -h$HOST -P$PORT -u$USER -p$PASS $DB -sN -e "SELECT user_pass FROM user WHERE user_id = '$username' AND user_enable=1 AND (TO_DAYS(now()) >= TO_DAYS(user_start_date) OR user_start_date='0000-00-00') AND (TO_DAYS(now()) <= TO_DAYS(user_end_date) OR user_end_date='0000-00-00')")
diff --git a/update.sh b/update.sh
index d7d07fe..98f2b24 100755
--- a/update.sh
+++ b/update.sh
@@ -39,3 +39,9 @@ cd "$www"
 
 bower --allow-root install
 chown -R "$user:$group" "$www"
+
+rm "/etc/openvpn/scripts/"{connect.sh,disconnect.sh,login.sh,functions.sh}
+cp "$base_path/installation/scripts/"{connect.sh,disconnect.sh,login.sh,functions.sh} "/etc/openvpn/scripts"
+chmod +x "/etc/openvpn/scripts/"{connect.sh,disconnect.sh,login.sh,functions.sh}
+
+echo "OpenVPN-admin upgraded."