diff --git a/transmission/updatePort.sh b/transmission/updatePort.sh
index 2bf2e6b36..990ef761b 100755
--- a/transmission/updatePort.sh
+++ b/transmission/updatePort.sh
@@ -4,11 +4,8 @@
 . /etc/transmission/environment-variables.sh
 
 # Settings
-PIA_PASSWD_FILE=/config/openvpn-credentials.txt
 TRANSMISSION_PASSWD_FILE=/config/transmission-credentials.txt
 
-pia_username=$(head -1 $PIA_PASSWD_FILE)
-pia_passwd=$(tail -1 $PIA_PASSWD_FILE)
 transmission_username=$(head -1 $TRANSMISSION_PASSWD_FILE)
 transmission_passwd=$(tail -1 $TRANSMISSION_PASSWD_FILE)
 pia_client_id_file=/etc/transmission/pia_client_id
@@ -19,21 +16,21 @@ transmission_settings_file=${TRANSMISSION_HOME}/settings.json
 #
 
 new_client_id() {
-    head -n 100 /dev/urandom | md5sum | tr -d " -" | tee $pia_client_id_file
+    head -n 100 /dev/urandom | sha256sum | tr -d " -" | tee $pia_client_id_file
 }
 
 pia_client_id="$(cat $pia_client_id_file 2>/dev/null)"
-if [ -z ${pia_client_id} ]; then
+if [ -z "${pia_client_id}" ]; then
    echo "Generating new client id for PIA"
    pia_client_id=$(new_client_id)
 fi
 
 # Get the port
 port_assignment_url="http://209.222.18.222:2000/?client_id=$pia_client_id"
-pia_response=$(curl -s -f $port_assignment_url)
+pia_response=$(curl -s -f "$port_assignment_url")
 pia_curl_exit_code=$?
 
-if [  -z $pia_response ]; then
+if [ -z "$pia_response" ]; then
     echo "Port forwarding is already activated on this connection, has expired, or you are not connected to a PIA region that supports port forwarding"
 fi
 
@@ -44,14 +41,14 @@ if [ $pia_curl_exit_code -ne 0 ]; then
 fi
 
 # Check for errors in PIA response
-error=$(echo $pia_response | grep -oE "\"error\".*\"")
+error=$(echo "$pia_response" | grep -oE "\"error\".*\"")
 if [ ! -z "$error" ]; then
    echo "PIA returned an error: $error"
    exit
 fi
 
 # Get new port, check if empty
-new_port=$(echo $pia_response | grep -oE "[0-9]+")
+new_port=$(echo "$pia_response" | grep -oE "[0-9]+")
 if [ -z "$new_port" ]; then
     echo "Could not find new port from PIA"
     exit
@@ -63,7 +60,8 @@ echo "Got new port $new_port from PIA"
 #
 
 # Check if transmission remote is set up with authentication
-auth_enabled=$(grep 'rpc-authentication-required\"' $transmission_settings_file | grep -oE 'true|false')
+auth_enabled=$(grep 'rpc-authentication-required\"' "$transmission_settings_file" \
+                   | grep -oE 'true|false')
 if [ "true" = "$auth_enabled" ]
   then
   echo "transmission auth required"
@@ -79,11 +77,11 @@ if [ "$new_port" != "$transmission_peer_port" ]; then
   if [ "true" = "$ENABLE_UFW" ]; then
     echo "Update UFW rules before changing port in Transmission"
 
-    echo "denying access to $TRANSMISSION_PEER_PORT"
-    ufw deny $TRANSMISSION_PEER_PORT
+    echo "denying access to $transmission_peer_port"
+    ufw deny "$transmission_peer_port"
 
     echo "allowing $new_port through the firewall"
-    ufw allow $new_port
+    ufw allow "$new_port"
   fi
 
   transmission-remote $myauth -p "$new_port"