diff --git a/installers/raspbian.sh b/installers/raspbian.sh
index 9118b022..24d8f665 100755
--- a/installers/raspbian.sh
+++ b/installers/raspbian.sh
@@ -2,29 +2,24 @@
 #
 # RaspAP Quick Installer
 # Author: @billz <billzimmerman@gmail.com>
+# Author URI: https://github.com/billz/
 # License: GNU General Public License v3.0
+# License URI: https://github.com/billz/raspap-webgui/blob/master/LICENSE
+#
+# Usage: raspbian.sh options
 #
 # Installs an instance of RaspAP.
 #
-# Available options:
-# -y, --yes, --assume-yes
-#    Assume "yes" as answer to all prompts and run non-interactively
-# -c, --cert, --certficate
-#    Installs mkcert and generates an SSL certificate for lighttpd
-# -o, --openvpn <flag>
-#    Used with -y, --yes, sets OpenVPN install option (0=no install)
-# -a, --adblock <flag>
-#    Used with -y, --yes, sets Adblock install option (0=no install)
-# -r, --repo, --repository <name>
-#    Overrides the default GitHub repo (billz/raspap-webgui)
-# -b, --branch <name>
-#    Overrides the default git branch (master)
-# -h, --help
-#    Outputs usage notes and exits
-# -u, --upgrade
-#    Upgrades an existing installation to the latest release version
-# -v, --version
-#    Outputs release info and exits
+# OPTIONS:
+# -y, --yes, --assume-yes           Assume "yes" as answer to all prompts and run non-interactively
+# -c, --cert, --certficate          Installs mkcert and generates an SSL certificate for lighttpd
+# -o, --openvpn <flag>              Used with -y, --yes, sets OpenVPN install option (0=no install)
+# -a, --adblock <flag>              Used with -y, --yes, sets Adblock install option (0=no install)
+# -r, --repo, --repository <name>   Overrides the default GitHub repo (billz/raspap-webgui)
+# -b, --branch <name>               Overrides the default git branch (master)
+# -h, --help                        Outputs usage notes and exits
+# -u, --upgrade                     Upgrades an existing installation to the latest release version
+# -v, --version                     Outputs release info and exits
 #
 # Depending on options passed to the installer, ONE of the following
 # additional shell scripts will be downloaded and sourced:
@@ -36,54 +31,19 @@
 # You are not obligated to bundle the LICENSE file with your RaspAP projects as long
 # as you leave these references intact in the header comments of your source files.
 
-# Fetch latest release from GitHub API
-repo="billz/raspap-webgui" #override with -r, --repo option
-readonly RASPAP_LATEST=$(curl -s "https://api.github.com/repos/$repo/releases/latest" | grep -Po '"tag_name": "\K.*?(?=")' )
-branch="$RASPAP_LATEST" #override with -b, --branch option
+set -eo pipefail
+readonly PROGNAME=$(basename $0)
 
-function _setup_colors() {
-    ANSI_RED="\033[0;31m"
-    ANSI_GREEN="\033[0;32m"
-    ANSI_YELLOW="\033[0;33m"
-    ANSI_RASPBERRY="\033[0;35m"
-    ANSI_ERROR="\033[1;37;41m"
-    ANSI_RESET="\033[m"
-}
+function _main() {
+    # set defaults
+    repo="billz/raspap-webgui" # override with -r, --repo option
+    branch="$RASPAP_LATEST"    # override with -b, --branch option
 
-function _log_output() {
-    readonly LOGFILE_PATH="/tmp"
-    exec > >(tee -i $LOGFILE_PATH/raspap_install.log)
-    exec 2>&1
-}
-
-function _usage() {
-    cat << EOF
-Usage: $(basename "$0") [OPTION]
-
-Installs an instance of RaspAP.
-
-Available options:
--y, --yes, --assume-yes
-    Assumes "yes" as an answer to all prompts
--c, --cert, --certificate
-    Installs an SSL certificate for lighttpd
--o, --openvpn <flag>
-    Used with -y, --yes, sets OpenVPN install option (0=no install)
--a, --adblock <flag>
-    Used with -y, --yes, sets Adblock install option (0=no install)
--r, --repo, --repository <name>
-    Overrides the default GitHub repo (billz/raspap-webgui)
--b, --branch <name>
-    Overrides the default git branch (latest release)
--h, --help
-    Outputs usage notes and exits
--u, --upgrade
-    Upgrades an existing installation to the latest release version
--v, --version
-    Outputs release info and exits
-
-EOF
-    exit
+    _parse_params "$@"
+    _get_release
+    _setup_colors
+    _log_output
+    _load_installer
 }
 
 function _parse_params() {
@@ -94,7 +54,7 @@ function _parse_params() {
     adblock_option=1
 
     while :; do
-        case ${1} in
+        case "${1-}" in
             -y|--yes|--assume-yes)
             assume_yes=1
             apt_option="-y"
@@ -140,16 +100,57 @@ function _parse_params() {
     done
 }
 
-function _version() {
-    echo -e "RaspAP v${RASPAP_LATEST} - Simple AP setup & WiFi management for Debian-based devices"
+function _setup_colors() {
+    ANSI_RED="\033[0;31m"
+    ANSI_GREEN="\033[0;32m"
+    ANSI_YELLOW="\033[0;33m"
+    ANSI_RASPBERRY="\033[0;35m"
+    ANSI_ERROR="\033[1;37;41m"
+    ANSI_RESET="\033[m"
+}
+
+function _log_output() {
+    readonly LOGFILE_PATH="/tmp"
+    exec > >(tee -i $LOGFILE_PATH/raspap_install.log)
+    exec 2>&1
+}
+
+function _usage() {
+    cat << EOF
+Usage: $PROGNAME options
+
+Installs an instance of RaspAP.
+
+OPTIONS:
+-y, --yes, --assume-yes             Assumes "yes" as an answer to all prompts
+-c, --cert, --certificate           Installs an SSL certificate for lighttpd
+-o, --openvpn <flag>                Used with -y, --yes, sets OpenVPN install option (0=no install)
+-a, --adblock <flag>                Used with -y, --yes, sets Adblock install option (0=no install)
+-r, --repo, --repository <name>     Overrides the default GitHub repo (billz/raspap-webgui)
+-b, --branch <name>                 Overrides the default git branch (latest release)
+-u, --upgrade                       Upgrades an existing installation to the latest release version
+-v, --version                       Outputs release info and exits
+-h, --help                          Outputs usage notes and exits
+
+Examples:
+    Run locally specifying GitHub repo and branch:
+    $PROGNAME --repo foo/bar --branch my/branch
+
+    Run locally requesting release info:
+    $PROGNAME --version
+
+    Invoke installer remotely, run non-interactively with option flags:
+    curl -sL https://install.raspap.com | bash -s -- --yes --openvpn 1 --adblock 0
+
+EOF
     exit
 }
 
-_parse_params "$@"
-_setup_colors
-_log_output
-
-UPDATE_URL="https://raw.githubusercontent.com/$repo/$branch/"
+function _version() {
+    _get_release
+    echo -e "RaspAP v${RASPAP_LATEST} - Simple AP setup & WiFi management for Debian-based devices"
+    exit
+}
 
 # Outputs a welcome message
 function _display_welcome() {
@@ -166,6 +167,11 @@ function _display_welcome() {
     echo -e "The Quick Installer will guide you through a few easy steps${ANSI_RESET}\n\n"
 }
 
+# Fetch latest release from GitHub API
+function _get_release() {
+    readonly RASPAP_LATEST=$(curl -s "https://api.github.com/repos/$repo/releases/latest" | grep -Po '"tag_name": "\K.*?(?=")' )
+}
+
 # Outputs a RaspAP Install log line
 function _install_log() {
     echo -e "${ANSI_GREEN}RaspAP Install: $1${ANSI_RESET}"
@@ -197,15 +203,20 @@ function _update_system_packages() {
 }
 
 # Fetch required installer functions
-if [ "${install_cert:-}" = 1 ]; then
-    source="mkcert"
-    wget -q ${UPDATE_URL}installers/${source}.sh -O /tmp/raspap_${source}.sh
-    source /tmp/raspap_${source}.sh && rm -f /tmp/raspap_${source}.sh
-    _install_certificate || _install_status 1 "Unable to install certificate"
-else
-    source="common"
-    wget -q ${UPDATE_URL}installers/${source}.sh -O /tmp/raspap_${source}.sh
-    source /tmp/raspap_${source}.sh && rm -f /tmp/raspap_${source}.sh
-    _install_raspap || _install_status 1 "Unable to install RaspAP"
-fi
+function _load_installer() {
+    UPDATE_URL="https://raw.githubusercontent.com/$repo/$branch/"
+    if [ "${install_cert:-}" = 1 ]; then
+        source="mkcert"
+        wget -q ${UPDATE_URL}installers/${source}.sh -O /tmp/raspap_${source}.sh
+        source /tmp/raspap_${source}.sh && rm -f /tmp/raspap_${source}.sh
+        _install_certificate || _install_status 1 "Unable to install certificate"
+    else
+        source="common"
+        wget -q ${UPDATE_URL}installers/${source}.sh -O /tmp/raspap_${source}.sh
+        source /tmp/raspap_${source}.sh && rm -f /tmp/raspap_${source}.sh
+        _install_raspap || _install_status 1 "Unable to install RaspAP"
+    fi
+}
+
+_main "$@"