diff --git a/starter_theme.sh b/starter_theme.sh
index 9524be1..80dc8f3 100644
--- a/starter_theme.sh
+++ b/starter_theme.sh
@@ -1,39 +1,70 @@
-echo Would you like to install a theme using the FE Setup script? \(y/n\) Be sure not to overwrite an existing theme.
-read install_theme
-if [ $install_theme == 'y' -o $install_theme == 'Y' ]
+#!/bin/bash
+
+# Setup colours for us in our output messages.
+BLACK_TXT=`tput setaf 0`
+RED_TXT=`tput setaf 1`
+GREEN_TXT=`tput setaf 2`
+YELLOW_TXT=`tput setaf 3`
+BLACK_BG=`tput setab 0`
+RED_BG=`tput setab 1`
+GREEN_BG=`tput setab 2`
+YELLOW_BG=`tput setab 3`
+RESET=`tput sgr0`
+
+# Get composer version because in order to run properly this script requires
+# Composer 2. See: https://github.com/composer/composer/issues/3299.
+# Cuts will return overall composer version (ie. 1 or 2).
+COMPOSER_VERSION_COMMAND="composer --version --no-ansi | cut -d \" \" -f 3 | cut -d \".\" -f 1"
+COMPOSER_VERSION=$(eval "$COMPOSER_VERSION_COMMAND")
+if [ "$COMPOSER_VERSION" -lt 2 ]
 then
-  echo What is the theme name? \(This value should be all lowercase, and will replace \'yellowpencil\' in the starter theme.\)
-  read theme_name
-  echo What is the URL of the project repository? \(This should follow the format \'https://git.yellowpencil.com/yellowpencil/theme-name\'.\)
-  read repo_url
-  SEARCH_PATH=web/themes
-  SEARCH=yellowpencil
-  SEARCH_R=[Yy]ellow[Pp]encil
-  REPLACE=$theme_name
-  REPO=$repo_url
-  if [ -d "$SEARCH_PATH/$REPLACE" -a ! -h "$SEARCH_PATH/$REPLACE" ]
-  then
-    BLACK_BG=`tput setaf 0`
-    YELLOW_TXT=`tput setab 3`
-    RESET=`tput sgr0`
-    echo "${YELLOW_TXT}${BLACK_BG} Theme already exists. ${RESET}";
-    exit 0;
-  fi
-  git clone git@git.yellowpencil.com:yellowpencil/yp_drupal8_theme.git $SEARCH_PATH/$REPLACE
-  mv $SEARCH_PATH/$REPLACE/yellowpencil/* $SEARCH_PATH/$REPLACE
-  rm -r $SEARCH_PATH/$REPLACE/yellowpencil
-  rm -rf $SEARCH_PATH/$REPLACE/.git
-  rm -rf $SEARCH_PATH/$REPLACE/.gitignore
-  find ${SEARCH_PATH} -type f -name "*${SEARCH}*" | while read FILENAME ; do
-      NEW_FILENAME="$(echo ${FILENAME} | sed -e "s/${SEARCH}/${REPLACE}/g")";
-      mv "${FILENAME}" "${NEW_FILENAME}";
-  done
-  find ${SEARCH_PATH} -type f -name "*.twig" -print0 | xargs -0 sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g"
-  find ${SEARCH_PATH} -type f -name "*.theme" -print0 | xargs -0 sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g"
-  find ${SEARCH_PATH} -type f -name "*.yml" -print0 | xargs -0 sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g"
-  find ${SEARCH_PATH} -type f -name "*.txt" -print0 | xargs -0 sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g"
-  PACKAGE_FILE=$(find ${SEARCH_PATH}/${REPLACE} -type f -name "package.json" -print0)
-  sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g" $PACKAGE_FILE
-  sed -i '' -e "s,https:\/\/[^\"#]*,${REPO},g" $PACKAGE_FILE
-  echo $REPO_REPLACE
+  echo "${YELLOW_BG}${BLACK_TXT} Theme setup script requires Composer 2. Please note the rest of the composer install command has still be ran as expected - the theme setup is an optional step. ${RESET}";
+  echo "${YELLOW_BG}${BLACK_TXT} If you are setting up a site please also note that the site installation profile will still be able to be installed. ${RESET}";
+  exit 0;
 fi
+
+# Check if the user actually wants to run the install script or not.
+echo "Would you like to install a theme using the starter theme front-end setup script? (${GREEN_TXT}Y${RESET}/${RED_TXT}N${RESET})";
+read install_theme
+if [ "$install_theme" != 'y' -a "$install_theme" != 'Y' ]
+then
+  echo "${YELLOW_BG}${BLACK_TXT} Theme will not be setup. Please note the rest of the composer install command has still be ran as expected - the theme setup is an optional step. ${RESET}";
+  echo "${YELLOW_BG}${BLACK_TXT} If you are setting up a site please also note that the site installation profile will still be able to be installed. ${RESET}";
+  exit 0;
+fi
+
+# fe_setup.sh script runs from here on.
+echo What is the theme name? \(This value should be all lowercase, and will replace \'yellowpencil\' in the starter theme.\)
+read theme_name
+echo What is the URL of the project repository? \(This should follow the format \'https://git.yellowpencil.com/yellowpencil/theme-name\'.\)
+read repo_url
+SEARCH_PATH=web/themes
+SEARCH=yellowpencil
+SEARCH_R=[Yy]ellow[Pp]encil
+REPLACE=$theme_name
+REPO=$repo_url
+# Check if the theme already exists and is so exit so we don't accidentally
+# overwrite anything.
+if [ -d "$SEARCH_PATH/$REPLACE" -a ! -h "$SEARCH_PATH/$REPLACE" ]
+then
+  echo "${YELLOW_BG}${BLACK_TXT} Theme already exists. Please note the rest of the composer install command has still be ran as expected - the theme setup is an optional step. ${RESET}";
+  echo "${YELLOW_BG}${BLACK_TXT} If you are setting up a site please also note that the site installation profile will still be able to be installed. ${RESET}";
+  exit 0;
+fi
+git clone git@git.yellowpencil.com:yellowpencil/yp_drupal8_theme.git $SEARCH_PATH/$REPLACE
+mv $SEARCH_PATH/$REPLACE/yellowpencil/* $SEARCH_PATH/$REPLACE
+rm -r $SEARCH_PATH/$REPLACE/yellowpencil
+rm -rf $SEARCH_PATH/$REPLACE/.git
+rm -rf $SEARCH_PATH/$REPLACE/.gitignore
+find ${SEARCH_PATH} -type f -name "*${SEARCH}*" | while read FILENAME ; do
+    NEW_FILENAME="$(echo ${FILENAME} | sed -e "s/${SEARCH}/${REPLACE}/g")";
+    mv "${FILENAME}" "${NEW_FILENAME}";
+done
+find ${SEARCH_PATH} -type f -name "*.twig" -print0 | xargs -0 sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g"
+find ${SEARCH_PATH} -type f -name "*.theme" -print0 | xargs -0 sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g"
+find ${SEARCH_PATH} -type f -name "*.yml" -print0 | xargs -0 sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g"
+find ${SEARCH_PATH} -type f -name "*.txt" -print0 | xargs -0 sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g"
+PACKAGE_FILE=$(find ${SEARCH_PATH}/${REPLACE} -type f -name "package.json" -print0)
+sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g" $PACKAGE_FILE
+sed -i '' -e "s,https:\/\/[^\"#]*,${REPO},g" $PACKAGE_FILE
+echo "${GREEN_TXT}The '${theme_name}' theme has been successfully created.${RESET}";