diff --git a/advanced/Scripts/update.sh b/advanced/Scripts/update.sh
index 6aef183b..4281d69f 100755
--- a/advanced/Scripts/update.sh
+++ b/advanced/Scripts/update.sh
@@ -19,8 +19,12 @@ readonly ADMIN_INTERFACE_DIR="/var/www/html/admin"
 readonly PI_HOLE_GIT_URL="https://github.com/pi-hole/pi-hole.git"
 readonly PI_HOLE_FILES_DIR="/etc/.pihole"
 
+# shellcheck disable=SC2034
 PH_TEST=true
-source ${PI_HOLE_FILES_DIR}/automated\ install/basic-install.sh
+
+# Have to ignore the following rule as spaces in paths are not supported by ShellCheck
+#shellcheck disable=SC1090
+source "${PI_HOLE_FILES_DIR}/automated install/basic-install.sh"
 
 # is_repo() sourced from basic-install.sh
 # make_repo() sourced from basic-install.sh
@@ -30,14 +34,14 @@ source ${PI_HOLE_FILES_DIR}/automated\ install/basic-install.sh
 GitCheckUpdateAvail() {
   local directory="${1}"
   curdir=$PWD
-  cd "${directory}"
+  cd "${directory}" || return
 
   # Fetch latest changes in this repo
   git fetch --quiet origin
 
   # @ alone is a shortcut for HEAD. Older versions of git
   # need @{0}
-  LOCAL="$(git rev-parse @{0})"
+  LOCAL="$(git rev-parse "@{0}")"
 
   # The suffix @{upstream} to a branchname
   # (short form <branchname>@{u}) refers
@@ -46,7 +50,7 @@ GitCheckUpdateAvail() {
   # (configured with branch.<name>.remote and
   # branch.<name>.merge). A missing branchname
   # defaults to the current one.
-  REMOTE="$(git rev-parse @{upstream})"
+  REMOTE="$(git rev-parse "@{upstream}")"
 
   if [[ ${#LOCAL} == 0 ]]; then
     echo "::: Error: Local revision could not be obtained, ask Pi-hole support."
@@ -62,7 +66,7 @@ GitCheckUpdateAvail() {
   fi
 
   # Change back to original directory
-  cd "${curdir}"
+  cd "${curdir}" || exit
 
   if [[ "${LOCAL}" != "${REMOTE}" ]]; then
     # Local branch is behind remote branch -> Update
@@ -77,8 +81,10 @@ GitCheckUpdateAvail() {
 
 FTLcheckUpdate() {
 
-	local FTLversion=$(/usr/bin/pihole-FTL tag)
-	local FTLlatesttag=$(curl -sI https://github.com/pi-hole/FTL/releases/latest | grep 'Location' | awk -F '/' '{print $NF}' | tr -d '\r\n')
+	local FTLversion
+	FTLversion=$(/usr/bin/pihole-FTL tag)
+	local FTLlatesttag
+	FTLlatesttag=$(curl -sI https://github.com/pi-hole/FTL/releases/latest | grep 'Location' | awk -F '/' '{print $NF}' | tr -d '\r\n')
 
 	if [[ "${FTLversion}" != "${FTLlatesttag}" ]]; then
 		return 0
@@ -90,6 +96,7 @@ FTLcheckUpdate() {
 main() {
   local pihole_version_current
   local web_version_current
+  #shellcheck disable=1090,2154
   source "${setupVars}"
 
   #This is unlikely
diff --git a/automated install/basic-install.sh b/automated install/basic-install.sh
index 053e04ba..2cf2c61d 100755
--- a/automated install/basic-install.sh	
+++ b/automated install/basic-install.sh	
@@ -344,8 +344,8 @@ useIPv6dialog() {
   # Determine type of found IPv6 addresses
   for i in "${IPV6_ADDRESSES[@]}"; do
     result=$(testIPv6 "$i")
-    [[ "${result}" == "ULA" ]] && ULA_ADDRESS="$i"
-    [[ "${result}" == "GUA" ]] && GUA_ADDRESS="$i"
+    [[ "${result}" == "ULA" ]] && ULA_ADDRESS="${i%/*}"
+    [[ "${result}" == "GUA" ]] && GUA_ADDRESS="${i%/*}"
   done
 
   # Determine which address to be used: Prefer ULA over GUA or don't use any if none found
@@ -1510,10 +1510,9 @@ main() {
   else
     echo "::: Update complete!"
   fi
-
   if [[ ${INSTALL_WEB} == true ]]; then
     if (( ${#pw} > 0 )) ; then
-      echo ":::"
+  echo ":::"
       echo "::: Note: As security measure a password has been installed for your web interface"
       echo "::: The currently set password is"
       echo ":::                                ${pw}"
@@ -1524,7 +1523,8 @@ main() {
   fi
 
   echo ":::"
-  echo "::: The install log is located at: /etc/pihole/install.log"
+  echo "::: The install log is located at: /etc/pihole/install.log
+  "
 }
 
 if [[ "${PH_TEST}" != true ]] ; then
diff --git a/gravity.sh b/gravity.sh
index 285ce5c3..41e3c68a 100755
--- a/gravity.sh
+++ b/gravity.sh
@@ -46,9 +46,9 @@ else
 	exit 1
 fi
 
-#Remove the /* from the end of the IPv4addr.
+#Remove the /* from the end of the IP addresses
 IPV4_ADDRESS=${IPV4_ADDRESS%/*}
-IPV6_ADDRESS=${IPV6_ADDRESS}
+IPV6_ADDRESS=${IPV6_ADDRESS%/*}
 
 # Variables for various stages of downloading and formatting the list
 basename=pihole
diff --git a/test/test_shellcheck.py b/test/test_shellcheck.py
index fa342027..5b1a8961 100644
--- a/test/test_shellcheck.py
+++ b/test/test_shellcheck.py
@@ -7,7 +7,7 @@ run_local = testinfra.get_backend(
 
 def test_scripts_pass_shellcheck():
     ''' Make sure shellcheck does not find anything wrong with our shell scripts '''
-    shellcheck = "find . -type f \( -name 'update.sh' -o -name 'piholeDebug.sh' \) | while read file; do shellcheck \"$file\"; done;"
+    shellcheck = "find . -type f -name 'update.sh' | while read file; do shellcheck -x \"$file\" -e SC1090,SC1091; done;"
     results = run_local(shellcheck)
     print results.stdout
     assert '' == results.stdout