diff --git a/Changes b/Changes
index d328e031..20e1e3dc 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,13 @@
 Release history for Zonemaster component Zonemaster-CLI 
 
+v4.0.1 2022-07-08 (public fix version)
+
+ [Fixes]
+ - Adds missing installation instructions for CentOS Linux 7
+   (#275)
+ - Updates translation to Danish (#271)
+
+
 v4.0.0 2022-06-09 (public release version)
 
  [Breaking changes]
diff --git a/Makefile.PL b/Makefile.PL
index 5e1bfc56..2ad152e3 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -22,7 +22,7 @@ requires(
     'Locale::TextDomain' => 1.23,
     'MooseX::Getopt'     => 0,
     'Text::Reflow'       => 0,
-    'Zonemaster::Engine' => 4.005,
+    'Zonemaster::Engine' => 4.005001,
     'Zonemaster::LDNS'   => 2.002002,
 );
 
diff --git a/docs/Installation.md b/docs/Installation.md
index dcf448fb..fc8013aa 100644
--- a/docs/Installation.md
+++ b/docs/Installation.md
@@ -9,6 +9,7 @@
   * [Installation on Rocky Linux](#Installation-on-Rocky-Linux)
   * [Installation on Debian and Ubuntu](#Installation-on-Debian-and-Ubuntu)
   * [Installation on FreeBSD](#Installation-on-FreeBSD)
+  * [Installation on CentOS Linux 7](#Installation-on-CentOS-Linux-7)
 * [Post-installation sanity check](#Post-installation-sanity-check)
 * [Using zonemaster-cli](#Using-zonemaster-cli)
 * [What to do next?](#What-to-do-next)
@@ -157,6 +158,28 @@ Using pre-built packages is the preferred method for Debian and Ubuntu.
    cpanm Zonemaster::CLI
    ```
 
+### Installation on CentOS Linux 7
+
+> **Please note!** CentOS 7 will only be supported until the release of
+> v2023.1, which is planned to happen during the spring of 2023.
+
+1) Install binary dependencies:
+
+   ```sh
+   sudo yum install perl-JSON-XS perl-MooseX-Getopt
+   ```
+
+2) Install dependencies from CPAN:
+
+     ```sh
+     sudo cpanm Text::Reflow Locale::TextDomain
+     ```
+
+3) Install Zonemaster::CLI
+
+   ```sh
+   sudo cpanm Zonemaster::CLI
+   ```
 
 ## Post-installation sanity check
 
diff --git a/lib/Zonemaster/CLI.pm b/lib/Zonemaster/CLI.pm
index d13606a2..135caacf 100755
--- a/lib/Zonemaster/CLI.pm
+++ b/lib/Zonemaster/CLI.pm
@@ -11,7 +11,7 @@ use 5.014002;
 use strict;
 use warnings;
 
-use version; our $VERSION = version->declare( "v4.0.0" );
+use version; our $VERSION = version->declare( "v4.0.1" );
 
 use Locale::TextDomain 'Zonemaster-CLI';
 use Moose;
diff --git a/share/da.po b/share/da.po
index d946de2f..495d32f9 100644
--- a/share/da.po
+++ b/share/da.po
@@ -2,8 +2,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: 0.0.5\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2021-12-07 14:55+0000\n"
-"PO-Revision-Date: 2021-12-07 14:55+0000\n"
+"POT-Creation-Date: 2022-06-08 14:12+0000\n"
+"PO-Revision-Date: 2022-06-08 14:01+0000\n"
 "Last-Translator: haarbo@dk-hostmaster.dk\n"
 "Language-Team: Zonemaster Team\n"
 "Language: da\n"
@@ -136,8 +136,9 @@ msgstr "Udskriv den effektive profil benyttet i JSON-format, og afslut."
 msgid ""
 "Source IP address used to send queries. Setting an IP address not correctly "
 "configured on a local network interface causes cryptic error messages."
-msgstr "IP-adresse brugt til at sende forespørgsler fra. En ikke korrekt "
-"konfiguret IP-adresse på et lokalt interface medfører kryptiske fejlbeskeder."
+msgstr ""
+"IP-adresse brugt til at sende forespørgsler fra. En ikke korrekt konfiguret "
+"IP-adresse på et lokalt interface medfører kryptiske fejlbeskeder."
 
 #, perl-format
 msgid ""
@@ -147,6 +148,7 @@ msgid ""
 msgstr ""
 "Advarsel: Kunne ikke sætte locale kategori LC_MESSAGES til %s (er det "
 "installeret på dette system?).\n"
+"\n"
 
 #, perl-format
 msgid ""
@@ -156,6 +158,7 @@ msgid ""
 msgstr ""
 "Advarsel: Kunne ikke sætte locale kategori LC_CTYPE til %s (er det "
 "installeret på dette system?).\n"
+"\n"
 
 #, perl-brace-format
 msgid "Loading profile from {path}."
@@ -174,6 +177,9 @@ msgstr ""
 msgid "Must give the name of a domain to test.\n"
 msgstr "Domænenavn, der skal testes, skal angives.\n"
 
+msgid "The domain name contains consecutive dots.\n"
+msgstr "Domænenavnet indeholder flere dots (.) efter hinanden.\n"
+
 msgid "Seconds "
 msgstr "Sekunder "
 
@@ -220,12 +226,20 @@ msgstr ""
 msgid "%8s\t%5d entries.\n"
 msgstr "%8s\t%5d beskeder.\n"
 
+msgid "--ns must be a name or a name/ip pair."
+msgstr "--ns skal være et navn eller et navn/IP-adresse par."
+
+#, perl-brace-format
+msgid "The name of the nameserver '{nsname}' contains consecutive dots."
+msgstr ""
+"Navnet på navneserveren '{nsname}' indeholder flere dots (.) efter hinanden."
+
 msgid ""
-"Warning: Zonemaster::LDNS not compiled with libidn2, cannot handle non-ASCII "
-"names correctly."
+"Warning: Zonemaster::LDNS not compiled with IDN support, cannot handle non-"
+"ASCII names correctly."
 msgstr ""
-"Advarser: Zonemaster::LDNS er ikke kompileret med libidn2, kan derfor ikke "
-"benytte ikke-ASCII navne."
+"Advarsel: Zonemaster::LDNS er ikke kompileret med IDN-support, og kan derfor "
+"ikke håndtere ikke-ASCII navne korrekt."
 
 msgid "DEBUG"
 msgstr "FEJLSØG"
@@ -244,4 +258,3 @@ msgstr "FEJL"
 
 msgid "CRITICAL"
 msgstr "KRITISK"
-