diff --git a/config-examples/user-patches.sh b/config-examples/user-patches.sh
index a2adcb27..f114b4ef 100755
--- a/config-examples/user-patches.sh
+++ b/config-examples/user-patches.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # This user patches script runs right before starting the daemons.
 # That means, all the other configuration is in place, so the script
diff --git a/docs/content/config/advanced/override-defaults/user-patches.md b/docs/content/config/advanced/override-defaults/user-patches.md
index e03d9938..b1017336 100644
--- a/docs/content/config/advanced/override-defaults/user-patches.md
+++ b/docs/content/config/advanced/override-defaults/user-patches.md
@@ -21,7 +21,7 @@ If you are managing your directory structure yourself, create a `docker-data/dms
 The contents could look like this:
 
 ``` sh
-#! /bin/bash
+#!/bin/bash
 
 cat >/etc/amavis/conf.d/50-user << "END"
 use strict;
diff --git a/setup.sh b/setup.sh
index a17a9eeb..1642bf1f 100755
--- a/setup.sh
+++ b/setup.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # version   v1.0.0
 # executed  manually / via Make
diff --git a/target/bin/addalias b/target/bin/addalias
index b5d136ef..12941886 100755
--- a/target/bin/addalias
+++ b/target/bin/addalias
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/adddovecotmasteruser b/target/bin/adddovecotmasteruser
index 0f7d47ce..c59a980c 100755
--- a/target/bin/adddovecotmasteruser
+++ b/target/bin/adddovecotmasteruser
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/addmailuser b/target/bin/addmailuser
index 729bb4b8..8dd5406b 100755
--- a/target/bin/addmailuser
+++ b/target/bin/addmailuser
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/addrelayhost b/target/bin/addrelayhost
index 1bd606f5..a486db46 100755
--- a/target/bin/addrelayhost
+++ b/target/bin/addrelayhost
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/addsaslpassword b/target/bin/addsaslpassword
index d625d9d8..5c88246c 100755
--- a/target/bin/addsaslpassword
+++ b/target/bin/addsaslpassword
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/debug-fetchmail b/target/bin/debug-fetchmail
index 62d2d6aa..ab3df7e6 100755
--- a/target/bin/debug-fetchmail
+++ b/target/bin/debug-fetchmail
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/log.sh
 source /usr/local/bin/helpers/log.sh
diff --git a/target/bin/delalias b/target/bin/delalias
index 1389b9a4..0afc53d8 100755
--- a/target/bin/delalias
+++ b/target/bin/delalias
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/deldovecotmasteruser b/target/bin/deldovecotmasteruser
index 9e12f716..532eb99f 100755
--- a/target/bin/deldovecotmasteruser
+++ b/target/bin/deldovecotmasteruser
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/delmailuser b/target/bin/delmailuser
index 7424e113..f9b15e2d 100755
--- a/target/bin/delmailuser
+++ b/target/bin/delmailuser
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/delquota b/target/bin/delquota
index 47e89f57..0a5e4c0f 100755
--- a/target/bin/delquota
+++ b/target/bin/delquota
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/excluderelaydomain b/target/bin/excluderelaydomain
index e4091dcf..94f38965 100755
--- a/target/bin/excluderelaydomain
+++ b/target/bin/excluderelaydomain
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/fail2ban b/target/bin/fail2ban
index 596672c3..8a01d1b6 100755
--- a/target/bin/fail2ban
+++ b/target/bin/fail2ban
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/listalias b/target/bin/listalias
index f09643c9..69779407 100755
--- a/target/bin/listalias
+++ b/target/bin/listalias
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/listdovecotmasteruser b/target/bin/listdovecotmasteruser
index cf61555b..1f6f6123 100755
--- a/target/bin/listdovecotmasteruser
+++ b/target/bin/listdovecotmasteruser
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/listmailuser b/target/bin/listmailuser
index 0607b6cd..7310a471 100755
--- a/target/bin/listmailuser
+++ b/target/bin/listmailuser
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/open-dkim b/target/bin/open-dkim
index 7bf13598..5da2ba03 100755
--- a/target/bin/open-dkim
+++ b/target/bin/open-dkim
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/postfix-summary b/target/bin/postfix-summary
index df0f11f3..9e20d149 100755
--- a/target/bin/postfix-summary
+++ b/target/bin/postfix-summary
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/print-environment b/target/bin/print-environment
index 468c3f76..b053f1bd 100755
--- a/target/bin/print-environment
+++ b/target/bin/print-environment
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/quota-warning b/target/bin/quota-warning
index 860825f0..42235562 100755
--- a/target/bin/quota-warning
+++ b/target/bin/quota-warning
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # Report a quota usage warning to an user
 
diff --git a/target/bin/report-pflogsumm-yesterday b/target/bin/report-pflogsumm-yesterday
index 291e7a0d..f4280e0e 100755
--- a/target/bin/report-pflogsumm-yesterday
+++ b/target/bin/report-pflogsumm-yesterday
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/restrict-access b/target/bin/restrict-access
index 19f430da..5334a795 100755
--- a/target/bin/restrict-access
+++ b/target/bin/restrict-access
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/setquota b/target/bin/setquota
index a230b2f5..c15b995d 100755
--- a/target/bin/setquota
+++ b/target/bin/setquota
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/setup b/target/bin/setup
index a855e422..8d2093fb 100755
--- a/target/bin/setup
+++ b/target/bin/setup
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 SCRIPT='setup'
 
diff --git a/target/bin/updatedovecotmasteruser b/target/bin/updatedovecotmasteruser
index b9628184..621f116b 100755
--- a/target/bin/updatedovecotmasteruser
+++ b/target/bin/updatedovecotmasteruser
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/updatemailuser b/target/bin/updatemailuser
index 7a0d4075..327bcde6 100755
--- a/target/bin/updatemailuser
+++ b/target/bin/updatemailuser
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../scripts/helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/target/bin/virus-wiper b/target/bin/virus-wiper
index 94458a11..29d2e428 100755
--- a/target/bin/virus-wiper
+++ b/target/bin/virus-wiper
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 set -e
 
diff --git a/target/scripts/build/packages.sh b/target/scripts/build/packages.sh
index 5bb35437..6a29effe 100644
--- a/target/scripts/build/packages.sh
+++ b/target/scripts/build/packages.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # -eE :: exit on error (do this in functions as well)
 # -u  :: show (and exit) when using unset variables
diff --git a/target/scripts/check-for-changes.sh b/target/scripts/check-for-changes.sh
index 162ce720..5c3d34c6 100755
--- a/target/scripts/check-for-changes.sh
+++ b/target/scripts/check-for-changes.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # TODO: Adapt for compatibility with LDAP
 # Only the cert renewal change detection may be relevant for LDAP?
diff --git a/target/scripts/helpers/accounts.sh b/target/scripts/helpers/accounts.sh
index 52e7c371..9d6c44e6 100644
--- a/target/scripts/helpers/accounts.sh
+++ b/target/scripts/helpers/accounts.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # Support for Postfix accounts managed via Dovecot
 
diff --git a/target/scripts/helpers/aliases.sh b/target/scripts/helpers/aliases.sh
index 539abf9d..4d26f91a 100644
--- a/target/scripts/helpers/aliases.sh
+++ b/target/scripts/helpers/aliases.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 # Support for Postfix aliases
 
 # NOTE: LDAP doesn't appear to use this, but the docs page: "Use Cases | Forward-Only Mail-Server with LDAP"
diff --git a/target/scripts/helpers/change-detection.sh b/target/scripts/helpers/change-detection.sh
index 28817390..412b6322 100644
--- a/target/scripts/helpers/change-detection.sh
+++ b/target/scripts/helpers/change-detection.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # This helper supports the changedetector service. Used by:
 # - check-for-changes.sh
diff --git a/target/scripts/helpers/database/db.sh b/target/scripts/helpers/database/db.sh
index 990d0d2f..66476772 100644
--- a/target/scripts/helpers/database/db.sh
+++ b/target/scripts/helpers/database/db.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # Matches relative path to this scripts parent directory,
 # Must be defined above any function that would source relative to it:
diff --git a/target/scripts/helpers/database/manage/dovecot-quotas.sh b/target/scripts/helpers/database/manage/dovecot-quotas.sh
index 3d783f50..802eb78f 100644
--- a/target/scripts/helpers/database/manage/dovecot-quotas.sh
+++ b/target/scripts/helpers/database/manage/dovecot-quotas.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # Manage DB writes for: DATABASE_QUOTA
 
diff --git a/target/scripts/helpers/database/manage/postfix-accounts.sh b/target/scripts/helpers/database/manage/postfix-accounts.sh
index 37ae1647..ad91982f 100644
--- a/target/scripts/helpers/database/manage/postfix-accounts.sh
+++ b/target/scripts/helpers/database/manage/postfix-accounts.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # Manage DB writes for:
 # - DATABASE_ACCOUNTS
diff --git a/target/scripts/helpers/database/manage/postfix-virtual.sh b/target/scripts/helpers/database/manage/postfix-virtual.sh
index caef1bd3..c4108f90 100644
--- a/target/scripts/helpers/database/manage/postfix-virtual.sh
+++ b/target/scripts/helpers/database/manage/postfix-virtual.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # Manage DB writes for: DATABASE_VIRTUAL
 
diff --git a/target/scripts/helpers/dns.sh b/target/scripts/helpers/dns.sh
index 01b5fd0d..1a471d16 100644
--- a/target/scripts/helpers/dns.sh
+++ b/target/scripts/helpers/dns.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # Outputs the DNS label count (delimited by `.`) for the given input string.
 # Useful for determining an FQDN like `mail.example.com` (3), vs `example.com` (2).
diff --git a/target/scripts/helpers/error.sh b/target/scripts/helpers/error.sh
index 1a7b95e0..1dd81e55 100644
--- a/target/scripts/helpers/error.sh
+++ b/target/scripts/helpers/error.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 function _exit_with_error
 {
diff --git a/target/scripts/helpers/index.sh b/target/scripts/helpers/index.sh
index 1136db16..1e919513 100644
--- a/target/scripts/helpers/index.sh
+++ b/target/scripts/helpers/index.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source-path=target/scripts/helpers
 # This file serves as a single import for all helpers
diff --git a/target/scripts/helpers/lock.sh b/target/scripts/helpers/lock.sh
index 80e74aa0..69a10c1a 100644
--- a/target/scripts/helpers/lock.sh
+++ b/target/scripts/helpers/lock.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # This becomes the sourcing script name
 # (example: check-for-changes.sh)
diff --git a/target/scripts/helpers/log.sh b/target/scripts/helpers/log.sh
index eb031f55..80d8c4b0 100644
--- a/target/scripts/helpers/log.sh
+++ b/target/scripts/helpers/log.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck disable=SC2291 # Quote repeated spaces to avoid them collapsing into one.
 # shellcheck disable=SC2034 # VAR appears unused.
diff --git a/target/scripts/helpers/network.sh b/target/scripts/helpers/network.sh
index c0f7d0a8..a1e3665d 100644
--- a/target/scripts/helpers/network.sh
+++ b/target/scripts/helpers/network.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 function _mask_ip_digit
 {
diff --git a/target/scripts/helpers/postfix.sh b/target/scripts/helpers/postfix.sh
index f81a4955..09ad14c8 100644
--- a/target/scripts/helpers/postfix.sh
+++ b/target/scripts/helpers/postfix.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 # Support for Postfix features
 
 # Docs - virtual_mailbox_domains (Used in /etc/postfix/main.cf):
diff --git a/target/scripts/helpers/relay.sh b/target/scripts/helpers/relay.sh
index 0964a28b..05d79a40 100644
--- a/target/scripts/helpers/relay.sh
+++ b/target/scripts/helpers/relay.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 # Support for Relay Hosts
 
 # Description:
diff --git a/target/scripts/helpers/ssl.sh b/target/scripts/helpers/ssl.sh
index 4443acbe..0fc41f84 100644
--- a/target/scripts/helpers/ssl.sh
+++ b/target/scripts/helpers/ssl.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 function _setup_ssl
 {
diff --git a/target/scripts/helpers/utils.sh b/target/scripts/helpers/utils.sh
index 6c0b3ae4..04601ad4 100644
--- a/target/scripts/helpers/utils.sh
+++ b/target/scripts/helpers/utils.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 function _escape
 {
diff --git a/target/scripts/helpers/variables.sh b/target/scripts/helpers/variables.sh
index 2d7b972c..8753ff08 100644
--- a/target/scripts/helpers/variables.sh
+++ b/target/scripts/helpers/variables.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck disable=SC2034
 declare -A VARS
diff --git a/target/scripts/start-mailserver.sh b/target/scripts/start-mailserver.sh
index d8068c1e..8c71aaae 100755
--- a/target/scripts/start-mailserver.sh
+++ b/target/scripts/start-mailserver.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # ------------------------------------------------------------
 # ? >> Sourcing helpers & stacks
diff --git a/target/scripts/startup/check-stack.sh b/target/scripts/startup/check-stack.sh
index 0560dd01..f8a13b7c 100644
--- a/target/scripts/startup/check-stack.sh
+++ b/target/scripts/startup/check-stack.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 function _check
 {
diff --git a/target/scripts/startup/daemons-stack.sh b/target/scripts/startup/daemons-stack.sh
index 8215ff83..8fe0d967 100644
--- a/target/scripts/startup/daemons-stack.sh
+++ b/target/scripts/startup/daemons-stack.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 function _start_daemons
 {
diff --git a/target/scripts/startup/fixes-stack.sh b/target/scripts/startup/fixes-stack.sh
index 2486835f..9a2f9615 100644
--- a/target/scripts/startup/fixes-stack.sh
+++ b/target/scripts/startup/fixes-stack.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 function _apply_fixes
 {
diff --git a/target/scripts/startup/misc-stack.sh b/target/scripts/startup/misc-stack.sh
index 584d26db..a19efe92 100644
--- a/target/scripts/startup/misc-stack.sh
+++ b/target/scripts/startup/misc-stack.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 function _start_misc
 {
diff --git a/target/scripts/startup/setup-stack.sh b/target/scripts/startup/setup-stack.sh
index 412f500b..5ac703fc 100644
--- a/target/scripts/startup/setup-stack.sh
+++ b/target/scripts/startup/setup-stack.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 function _setup
 {
@@ -868,7 +868,7 @@ function _setup_security_stack
       sa-update --import /etc/spamassassin/kam/kam.sa-channels.mcgrail.com.key
 
       cat >"${SPAMASSASSIN_KAM_CRON_FILE}" <<"EOM"
-#! /bin/bash
+#!/bin/bash
 
 RESULT=$(sa-update --gpgkey 24C063D8 --channel kam.sa-channels.mcgrail.com 2>&1)
 EXIT_CODE=${?}
@@ -982,7 +982,7 @@ function _setup_mail_summary
       _log 'trace' 'Creating daily cron job for pflogsumm report'
 
       cat >/etc/cron.daily/postfix-summary << EOM
-#! /bin/bash
+#!/bin/bash
 
 /usr/local/bin/report-pflogsumm-yesterday ${HOSTNAME} ${PFLOGSUMM_RECIPIENT} ${PFLOGSUMM_SENDER}
 EOM
@@ -1030,7 +1030,7 @@ function _setup_logwatch
       fi
 
       cat >"${LOGWATCH_FILE}" << EOM
-#! /bin/bash
+#!/bin/bash
 
 /usr/sbin/logwatch ${INTERVAL} --hostname ${HOSTNAME} --mailto ${LOGWATCH_RECIPIENT}
 EOM
diff --git a/target/scripts/update-check.sh b/target/scripts/update-check.sh
index 40054d29..fb1294ad 100755
--- a/target/scripts/update-check.sh
+++ b/target/scripts/update-check.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=./helpers/log.sh
 source /usr/local/bin/helpers/log.sh
diff --git a/target/scripts/wrapper/fail2ban-wrapper.sh b/target/scripts/wrapper/fail2ban-wrapper.sh
index 883afcfd..32efebb5 100755
--- a/target/scripts/wrapper/fail2ban-wrapper.sh
+++ b/target/scripts/wrapper/fail2ban-wrapper.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # You cannot start fail2ban in some foreground mode and
 # it's more or less important that docker doesn't kill
diff --git a/target/scripts/wrapper/postfix-wrapper.sh b/target/scripts/wrapper/postfix-wrapper.sh
index 2de7ed8e..3a5ce5c4 100755
--- a/target/scripts/wrapper/postfix-wrapper.sh
+++ b/target/scripts/wrapper/postfix-wrapper.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # You cannot start postfix in some foreground mode and
 # it's more or less important that docker doesn't kill
diff --git a/target/scripts/wrapper/postsrsd-wrapper.sh b/target/scripts/wrapper/postsrsd-wrapper.sh
index 26279b39..0e249e5f 100755
--- a/target/scripts/wrapper/postsrsd-wrapper.sh
+++ b/target/scripts/wrapper/postsrsd-wrapper.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # shellcheck source=../helpers/index.sh
 source /usr/local/bin/helpers/index.sh
diff --git a/test/config/sieve-pipe/pipe_to_tmp b/test/config/sieve-pipe/pipe_to_tmp
index e51fe0d4..e34e9d51 100644
--- a/test/config/sieve-pipe/pipe_to_tmp
+++ b/test/config/sieve-pipe/pipe_to_tmp
@@ -1,2 +1,2 @@
-#! /bin/bash
+#!/bin/bash
 cat - > /tmp/pipe-test.out
diff --git a/test/config/user-patches/user-patches.sh b/test/config/user-patches/user-patches.sh
index ee347776..0e374662 100755
--- a/test/config/user-patches/user-patches.sh
+++ b/test/config/user-patches/user-patches.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 ##
 # This user script will be executed between configuration and starting daemons
 # To enable it you must save it in your config directory as "user-patches.sh"
diff --git a/test/linting/lint.sh b/test/linting/lint.sh
index 48d68269..3afb0cb0 100755
--- a/test/linting/lint.sh
+++ b/test/linting/lint.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 # version   v0.3.0
 # executed  by Make (during CI or manually)
diff --git a/test/test_helper/common.bash b/test/test_helper/common.bash
index 147b8e91..46b92317 100644
--- a/test/test_helper/common.bash
+++ b/test/test_helper/common.bash
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 load 'test_helper/bats-support/load'
 load 'test_helper/bats-assert/load'
diff --git a/test/test_helper/tls.bash b/test/test_helper/tls.bash
index ae4978c0..7ced47fb 100644
--- a/test/test_helper/tls.bash
+++ b/test/test_helper/tls.bash
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 load 'test_helper/common'