diff --git a/.travis.yml b/.travis.yml
index 3a165be78..b09193884 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -56,7 +56,7 @@ jobs:
       env:
         - TEST: shfmt check
       script:
-        - docker run -it --rm -v "$(pwd)":/sh -w /sh peterdavehello/shfmt:2.5.0 -i 2 -l -w -ci .
+        - docker run -it --rm -v "$(pwd)":/sh -w /sh peterdavehello/shfmt:2.5.0 -sr -i 2 -l -w -ci .
         - git diff --color
         - git diff --stat=220 --color --exit-code
 
diff --git a/functions.sh b/functions.sh
index 437110b3e..70f78a6ca 100755
--- a/functions.sh
+++ b/functions.sh
@@ -62,7 +62,7 @@ function get_variants() {
 
   arch=$(get_arch)
   variantsfilter=("$@")
-  IFS=' ' read -ra availablevariants <<<"$(grep "^${arch}" "${dir}/architectures" | sed -E 's/'"${arch}"'[[:space:]]*//' | sed -E 's/,/ /g')"
+  IFS=' ' read -ra availablevariants <<< "$(grep "^${arch}" "${dir}/architectures" | sed -E 's/'"${arch}"'[[:space:]]*//' | sed -E 's/,/ /g')"
 
   if [ ${#variantsfilter[@]} -gt 0 ]; then
     for variant1 in "${availablevariants[@]}"; do
@@ -100,16 +100,16 @@ function get_supported_arches() {
   shift
 
   # Get default supported arches
-  lines=$(grep "${variant}" "$(dirname "${version}")"/architectures 2>/dev/null | cut -d' ' -f1)
+  lines=$(grep "${variant}" "$(dirname "${version}")"/architectures 2> /dev/null | cut -d' ' -f1)
 
   # Get version specific supported architectures if there is specialized information
   if [ -a "${version}"/architectures ]; then
-    lines=$(grep "${variant}" "${version}"/architectures 2>/dev/null | cut -d' ' -f1)
+    lines=$(grep "${variant}" "${version}"/architectures 2> /dev/null | cut -d' ' -f1)
   fi
 
   while IFS='' read -r line; do
     arches+=("${line}")
-  done <<<"${lines}"
+  done <<< "${lines}"
 
   echo "${arches[@]}"
 }
@@ -149,13 +149,13 @@ function get_versions() {
   local default_variant
   default_variant=$(get_config "./" "default_variant")
   if [ ${#dirs[@]} -eq 0 ]; then
-    IFS=' ' read -ra dirs <<<"$(echo "${prefix%/}/"*/)"
+    IFS=' ' read -ra dirs <<< "$(echo "${prefix%/}/"*/)"
   fi
 
   for dir in "${dirs[@]}"; do
     if [ -a "${dir}/config" ]; then
       local subdirs
-      IFS=' ' read -ra subdirs <<<"$(get_versions "${dir#./}")"
+      IFS=' ' read -ra subdirs <<< "$(get_versions "${dir#./}")"
       for subdir in "${subdirs[@]}"; do
         versions+=("${subdir}")
       done
@@ -174,7 +174,7 @@ function get_fork_name() {
   version=$1
   shift
 
-  IFS='/' read -ra versionparts <<<"${version}"
+  IFS='/' read -ra versionparts <<< "${version}"
   if [ ${#versionparts[@]} -gt 1 ]; then
     echo "${versionparts[0]}"
   fi
@@ -260,7 +260,7 @@ function get_tag() {
   fi
 
   local tagparts
-  IFS=' ' read -ra tagparts <<<"$(get_fork_name "${version}") ${tagversion}"
+  IFS=' ' read -ra tagparts <<< "$(get_fork_name "${version}") ${tagversion}"
   IFS='-'
   echo "${tagparts[*]}"
   unset IFS
@@ -278,11 +278,11 @@ function sort_versions() {
 
   while IFS='' read -r line; do
     sorted+=("${line}")
-  done <<<"$(echo "${lines}" | grep "^[0-9]" | sort -r)"
+  done <<< "$(echo "${lines}" | grep "^[0-9]" | sort -r)"
 
   while IFS='' read -r line; do
     sorted+=("${line}")
-  done <<<"$(echo "${lines}" | grep -v "^[0-9]" | sort -r)"
+  done <<< "$(echo "${lines}" | grep -v "^[0-9]" | sort -r)"
 
   echo "${sorted[@]}"
 }
@@ -312,7 +312,7 @@ function images_updated() {
 
   commit_range="$(commit_range "$@")"
 
-  IFS=' ' read -ra versions <<<"$(
+  IFS=' ' read -ra versions <<< "$(
     IFS=','
     get_versions
   )"
diff --git a/generate-stackbrew-library.sh b/generate-stackbrew-library.sh
index 10db8daa9..b40d7374f 100755
--- a/generate-stackbrew-library.sh
+++ b/generate-stackbrew-library.sh
@@ -3,7 +3,7 @@
 set -e
 . functions.sh
 
-hash git 2>/dev/null || { echo >&2 "git not found, exiting."; }
+hash git 2> /dev/null || { echo >&2 "git not found, exiting."; }
 
 # Used dynamically: print "$array_" $1
 # shellcheck disable=SC2034
@@ -23,8 +23,8 @@ cd "$(cd "${0%/*}" && pwd -P)"
 
 self="$(basename "${BASH_SOURCE[0]}")"
 
-IFS=' ' read -ra versions <<<"$(get_versions)"
-IFS=' ' read -ra versions <<<"$(sort_versions "${versions[@]}")"
+IFS=' ' read -ra versions <<< "$(get_versions)"
+IFS=' ' read -ra versions <<< "$(sort_versions "${versions[@]}")"
 url='https://github.com/nodejs/docker-node'
 
 # get the most recent commit which modified any of "$@"
@@ -50,7 +50,7 @@ join() {
 get_stub() {
   local version="${1}"
   shift
-  IFS='/' read -ra versionparts <<<"${version}"
+  IFS='/' read -ra versionparts <<< "${version}"
   local stub
   eval stub="$(join '_' "${versionparts[@]}" | awk -F. '{ print "$array_" $1 }')"
   echo "${stub}"
@@ -65,11 +65,11 @@ for version in "${versions[@]}"; do
   fullVersion="$(get_tag "${version}" full)"
   majorMinorVersion="$(get_tag "${version}" majorminor)"
 
-  IFS=' ' read -ra versionAliases <<<"$fullVersion $majorMinorVersion $stub"
+  IFS=' ' read -ra versionAliases <<< "$fullVersion $majorMinorVersion $stub"
 
   if [ -f "${version}/Dockerfile" ]; then
     # Get supported architectures for a specific version. See details in function.sh
-    IFS=' ' read -ra supportedArches <<<"$(get_supported_arches "${version}" "default")"
+    IFS=' ' read -ra supportedArches <<< "$(get_supported_arches "${version}" "default")"
 
     echo "Tags: $(join ', ' "${versionAliases[@]}")"
     echo "Architectures: $(join ', ' "${supportedArches[@]}")"
@@ -80,7 +80,7 @@ for version in "${versions[@]}"; do
 
   # Get supported variants according to the target architecture.
   # See details in function.sh
-  IFS=' ' read -ra variants <<<"$(get_variants "$(dirname "${version}")")"
+  IFS=' ' read -ra variants <<< "$(get_variants "$(dirname "${version}")")"
   for variant in "${variants[@]}"; do
     # Skip non-docker directories
     [ -f "${version}/${variant}/Dockerfile" ] || continue
@@ -96,7 +96,7 @@ for version in "${versions[@]}"; do
 
     # Get supported architectures for a specific version and variant.
     # See details in function.sh
-    IFS=' ' read -ra supportedArches <<<"$(get_supported_arches "${version}" "${variant}")"
+    IFS=' ' read -ra supportedArches <<< "$(get_supported_arches "${version}" "${variant}")"
 
     echo "Tags: $(join ', ' "${variantAliases[@]}")"
     echo "Architectures: $(join ', ' "${supportedArches[@]}")"
diff --git a/generate-stackbrew-pr.sh b/generate-stackbrew-pr.sh
index 894ae8121..4f6aebab7 100755
--- a/generate-stackbrew-pr.sh
+++ b/generate-stackbrew-pr.sh
@@ -96,19 +96,19 @@ if images_updated "${COMMIT_ID}"; then
   setup_git_author
 
   info "Cloning..."
-  git clone --depth 50 "https://github.com/${UPSTREAM_SLUG}.git" ${gitpath} 2>/dev/null
+  git clone --depth 50 "https://github.com/${UPSTREAM_SLUG}.git" ${gitpath} 2> /dev/null
 
   stackbrew="$(./generate-stackbrew-library.sh)"
 
   cd ${gitpath}
 
-  echo "${stackbrew}" >"${IMAGES_FILE}"
+  echo "${stackbrew}" > "${IMAGES_FILE}"
   git checkout -b "${BRANCH_NAME}"
   git add "${IMAGES_FILE}"
   git commit -m "$(message)"
 
   info "Pushing..."
-  git push "https://${GITHUB_API_TOKEN}:x-oauth-basic@github.com/${ORIGIN_SLUG}.git" -f "${BRANCH_NAME}" 2>/dev/null || fatal "Error pushing the updated stackbrew"
+  git push "https://${GITHUB_API_TOKEN}:x-oauth-basic@github.com/${ORIGIN_SLUG}.git" -f "${BRANCH_NAME}" 2> /dev/null || fatal "Error pushing the updated stackbrew"
 
   cd - && rm -rf ${gitpath}
 
diff --git a/test-build.sh b/test-build.sh
index 26621a1e1..7b30e7509 100755
--- a/test-build.sh
+++ b/test-build.sh
@@ -9,8 +9,8 @@ set -euo pipefail
 # Convert comma delimited cli arguments to arrays
 # E.g. ./test-build.sh 8,10 slim,onbuild
 # "8,10" becomes "8 10" and "slim,onbuild" becomes "slim onbuild"
-IFS=',' read -ra versions_arg <<<"${1:-}"
-IFS=',' read -ra variant_arg <<<"${2:-}"
+IFS=',' read -ra versions_arg <<< "${1:-}"
+IFS=',' read -ra variant_arg <<< "${2:-}"
 
 default_variant=$(get_config "./" "default_variant")
 
@@ -62,7 +62,7 @@ function test_image() {
 
 cd "$(cd "${0%/*}" && pwd -P)" || exit
 
-IFS=' ' read -ra versions <<<"$(get_versions . "${versions_arg[@]}")"
+IFS=' ' read -ra versions <<< "$(get_versions . "${versions_arg[@]}")"
 if [ ${#versions[@]} -eq 0 ]; then
   fatal "No valid versions found!"
 fi
@@ -82,7 +82,7 @@ for version in "${versions[@]}"; do
 
   # Get supported variants according to the target architecture.
   # See details in function.sh
-  IFS=' ' read -ra variants <<<"$(get_variants "$(dirname "${version}")" "${variant_arg[@]}")"
+  IFS=' ' read -ra variants <<< "$(get_variants "$(dirname "${version}")" "${variant_arg[@]}")"
 
   for variant in "${variants[@]}"; do
     # Skip non-docker directories
diff --git a/travis.yml.template b/travis.yml.template
index 32da12913..fb258ddde 100644
--- a/travis.yml.template
+++ b/travis.yml.template
@@ -54,7 +54,7 @@ jobs:
       env:
         - TEST: shfmt check
       script:
-        - docker run -it --rm -v "$(pwd)":/sh -w /sh peterdavehello/shfmt:2.5.0 -i 2 -l -w -ci .
+        - docker run -it --rm -v "$(pwd)":/sh -w /sh peterdavehello/shfmt:2.5.0 -sr -i 2 -l -w -ci .
         - git diff --color
         - git diff --stat=220 --color --exit-code
 
diff --git a/update.sh b/update.sh
index 6466f9c20..cbab2a5ae 100755
--- a/update.sh
+++ b/update.sh
@@ -2,7 +2,7 @@
 set -ue
 
 function usage() {
-  cat <<EOF
+  cat << EOF
 
   Update the node docker images.
 
@@ -47,12 +47,12 @@ done
 
 cd "$(cd "${0%/*}" && pwd -P)"
 
-IFS=',' read -ra versions_arg <<<"${1:-}"
-IFS=',' read -ra variant_arg <<<"${2:-}"
+IFS=',' read -ra versions_arg <<< "${1:-}"
+IFS=',' read -ra variant_arg <<< "${2:-}"
 
-IFS=' ' read -ra versions <<<"$(get_versions .)"
-IFS=' ' read -ra update_versions <<<"$(get_versions . "${versions_arg[@]:-}")"
-IFS=' ' read -ra update_variants <<<"$(get_variants . "${variant_arg[@]:-}")"
+IFS=' ' read -ra versions <<< "$(get_versions .)"
+IFS=' ' read -ra update_versions <<< "$(get_versions . "${versions_arg[@]:-}")"
+IFS=' ' read -ra update_variants <<< "$(get_variants . "${variant_arg[@]:-}")"
 if [ ${#versions[@]} -eq 0 ]; then
   fatal "No valid versions found!"
 fi
@@ -151,7 +151,7 @@ function update_node_version() {
       while read -r line; do
         pattern='"\$\{'$(echo "${key_type}" | tr '[:lower:]' '[:upper:]')'_KEYS\[@\]\}"'
         sed -Ei -e "s/([ \\t]*)(${pattern})/\\1${line}${new_line}\\1\\2/" "${dockerfile}-tmp"
-      done <"keys/${key_type}.keys"
+      done < "keys/${key_type}.keys"
       sed -Ei -e "/${pattern}/d" "${dockerfile}-tmp"
     done
 
@@ -183,11 +183,11 @@ function add_stage() {
     - stage: Build
       env:
         - NODE_VERSION: "'"${version}"'"
-        - VARIANT: "'"${variant}"'"' >>.travis.yml
+        - VARIANT: "'"${variant}"'"' >> .travis.yml
 }
 
 echo '#### DO NOT MODIFY. THIS FILE IS AUTOGENERATED ####
-' | cat - travis.yml.template >.travis.yml
+' | cat - travis.yml.template > .travis.yml
 
 for version in "${versions[@]}"; do
   parentpath=$(dirname "${version}")
@@ -199,7 +199,7 @@ for version in "${versions[@]}"; do
 
   # Get supported variants according the target architecture
   # See details in function.sh
-  IFS=' ' read -ra variants <<<"$(get_variants "${parentpath}")"
+  IFS=' ' read -ra variants <<< "$(get_variants "${parentpath}")"
 
   if [ -f "${version}/Dockerfile" ]; then
     add_stage "${baseuri}" "${version}" "default"