diff --git a/release.sh b/release.sh
index 4eb2f82..9e21aaa 100755
--- a/release.sh
+++ b/release.sh
@@ -1,101 +1,103 @@
 #!/bin/bash
+# shellcheck disable=SC2016
 
 # script to set the version numbers on all files or generate changelogs for a release
 
 function pre_checks() {
-  # prechecks
-  if [[ -z "${2}" ]]; then
-    printf 'No version was provided\n'
-    printf 'Error\n'
-    exit 1
-  fi
-  # set mdlp version
-  mdlp_version="${2}"
+    # prechecks
+    if [[ -z "${2}" ]]; then
+        printf 'No version was provided\n'
+        printf 'Error\n'
+        exit 1
+    fi
+    # set mdlp version
+    mdlp_version="${2}"
 }
 
-function show_help(){
-  printf 'Script to change the version numbers of mangadlp in the build files, or generate release-notes for a release\n'
-  printf '\nUsage:\n'
-  printf '  ./release.sh <option> <mdlp-version>\n'
-  printf '\nOptions:\n'
-  printf '  --set-version         - Set version number on all build files\n'
-  printf '  --get-changelog       - Create RELEASENOTES.md for github/gitea release\n'
-  printf '\nExample:\n'
-  printf '  ./release.sh --get-releasenotes "2.0.5"\n'
-  exit 1
+function show_help() {
+    printf 'Script to change the version numbers of mangadlp in the build files, or generate release-notes for a release\n'
+    printf '\nUsage:\n'
+    printf '  ./release.sh <option> <mdlp-version>\n'
+    printf '\nOptions:\n'
+    printf '  --set-version         - Set version number on all build files\n'
+    printf '  --get-changelog       - Create RELEASENOTES.md for github/gitea release\n'
+    printf '\nExample:\n'
+    printf '  ./release.sh --get-releasenotes "2.0.5"\n'
+    exit 1
 }
 
 function set_ver_docker() {
-  printf 'Changing version in docker-files\n'
-  local docker_files docker_regex
-  docker_files=(
-  'docker/Dockerfile.amd64'
-  'docker/Dockerfile.arm64'
-  )
-  docker_regex='s,^ARG MDLP_VERSION=.*$,ARG MDLP_VERSION='"${mdlp_version}"',g'
-  for file in "${docker_files[@]}"; do
-    if ! sed -i "${docker_regex}" "${file}"; then return 1; fi
-  done
-  printf 'Done\n'
+    printf 'Changing version in docker-files\n'
+    local docker_files docker_regex
+    docker_files=(
+        'docker/Dockerfile.amd64'
+        'docker/Dockerfile.arm64'
+    )
+    docker_regex='s,^ARG MDLP_VERSION=.*$,ARG MDLP_VERSION='"${mdlp_version}"',g'
+    for file in "${docker_files[@]}"; do
+        if ! sed -i "${docker_regex}" "${file}"; then return 1; fi
+    done
+    printf 'Done\n'
 }
 
 function set_ver_pypi() {
-  printf 'Changing version in pypi-files\n'
-  local pypi_files pypi_regex
-  pypi_files=(
-  'setup.py'
-  )
-  pypi_regex='s/version=.*$/version=\"'"${mdlp_version}"'\",/g'
-  for file in "${pypi_files[@]}"; do
-    if ! sed -i "${pypi_regex}" "${file}"; then return 1; fi
-  done
-  printf 'Done\n'
+    printf 'Changing version in pypi-files\n'
+    local pypi_files pypi_regex
+    pypi_files=(
+        'setup.py'
+    )
+    pypi_regex='s/version=.*$/version=\"'"${mdlp_version}"'\",/g'
+    for file in "${pypi_files[@]}"; do
+        if ! sed -i "${pypi_regex}" "${file}"; then return 1; fi
+    done
+    printf 'Done\n'
 }
 
 # set version number in files
 function set_version() {
-  # check for version
-  if [[ -z "${mdlp_version}" ]]; then
-    printf 'You need to specify a version with $1\n'
-    exit 1
-  fi
-  # set docker versions
-  if ! set_ver_docker; then
-    printf 'Error\n'; fi
-  # set pypi versions
-  if ! set_ver_pypi; then
-    printf 'Error\n'; fi
+    # check for version
+    if [[ -z "${mdlp_version}" ]]; then
+        printf 'You need to specify a version with $1\n'
+        exit 1
+    fi
+    # set docker versions
+    if ! set_ver_docker; then
+        printf 'Error\n'
+    fi
+    # set pypi versions
+    if ! set_ver_pypi; then
+        printf 'Error\n'
+    fi
 }
 
 # create changelog for release
 function get_releasenotes() {
-  printf 'Creating release-notes\n'
-  # check for version
-  if [[ -z "${mdlp_version}" ]]; then
-    printf 'You need to specify a version with $1\n'
-    exit 1
-  fi
-  awk -v ver="[${mdlp_version}]" \
+    printf 'Creating release-notes\n'
+    # check for version
+    if [[ -z "${mdlp_version}" ]]; then
+        printf 'You need to specify a version with $1\n'
+        exit 1
+    fi
+    awk -v ver="[${mdlp_version}]" \
         '/^## / { if (p) { exit }; if ($2 == ver) { p=1; next } } p && NF' \
-          'CHANGELOG.md' > 'RELEASENOTES.md'
-  printf 'Done\n'
+        'CHANGELOG.md' >'RELEASENOTES.md'
+    printf 'Done\n'
 }
 
 # check options
 case "${1}" in
-  '--help'|'-h'|'help')
+'--help' | '-h' | 'help')
     show_help
-  ;;
-  '--set-version')
+    ;;
+'--set-version')
     pre_checks "${@}"
     set_version
-  ;;
-  '--get-releasenotes')
+    ;;
+'--get-releasenotes')
     pre_checks "${@}"
     get_releasenotes
-  ;;
-  *)
+    ;;
+*)
     show_help
-  ;;
+    ;;
 esac
-