diff --git a/Documentation/SOGoDevelopersGuide.asciidoc b/Documentation/SOGoDevelopersGuide.asciidoc
index f63efb186..5f320c608 100644
--- a/Documentation/SOGoDevelopersGuide.asciidoc
+++ b/Documentation/SOGoDevelopersGuide.asciidoc
@@ -118,7 +118,7 @@ Fonts
 ^^^^^
 
 * http://mozilla.github.io/Fira/[Mozilla Fira]
-* https://www.google.com/design/icons/[Material icons]
+* https://material.io/tools/icons/[Material icons]
 
 Building frontend
 -----------------
diff --git a/Documentation/SOGoInstallationGuide.asciidoc b/Documentation/SOGoInstallationGuide.asciidoc
index 4f19b4ad1..9050c39d3 100644
--- a/Documentation/SOGoInstallationGuide.asciidoc
+++ b/Documentation/SOGoInstallationGuide.asciidoc
@@ -1337,7 +1337,7 @@ pam logs and sogo logs.
 
 Currently, SOGo will ask for a CAS ticket using the same CAS service
 name for both IMAP and Sieve. *When CASifying sieve, this means that the
-`-s` parameter of `pam_cas`should be the same for both IMAP and Sieve*,
+`-s` parameter of `pam_cas` should be the same for both IMAP and Sieve*,
 otherwise the CAS server will complain:
 
 ----
diff --git a/Documentation/docinfo.xml b/Documentation/docinfo.xml
index a2aadf9a7..ec6e33fd6 100644
--- a/Documentation/docinfo.xml
+++ b/Documentation/docinfo.xml
@@ -1,7 +1,7 @@
 <!-- TODO have the build system take care of this  -->
-<releaseinfo>Version 4.0.5 - January 2019</releaseinfo>
-<subtitle>for version 4.0.5</subtitle>
-<date>2019-01-09</date>
+<releaseinfo>Version 4.0.6 - February 2019</releaseinfo>
+<subtitle>for version 4.0.6</subtitle>
+<date>2019-02-21</date>
 
 <legalnotice>
   <para>Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".</para>
diff --git a/Documentation/includes/global-attributes.asciidoc b/Documentation/includes/global-attributes.asciidoc
index e5d43bf1c..7d4b1aaf7 100644
--- a/Documentation/includes/global-attributes.asciidoc
+++ b/Documentation/includes/global-attributes.asciidoc
@@ -6,13 +6,13 @@
     Authors:
       - Inverse inc. <info@inverse.ca>
 
-    Copyright (C) 2008-2018 Inverse inc.
+    Copyright (C) 2008-2019 Inverse inc.
     License: GFDL 1.2 or later. http://www.gnu.org/licenses/fdl.html
 
 ////
 
 // TODO have the build system take care of this
 
-:release_version: 4.0.5
+:release_version: 4.0.6
 
 // vim: set syntax=asciidoc tabstop=2 shiftwidth=2 expandtab:
diff --git a/NEWS b/NEWS
index ea75752b2..5ba253487 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-4.0.6 (YYYY-MM-DD)
+4.0.6 (2019-02-21)
 ------------------
 
 Enhancements
diff --git a/Version b/Version
index 230a455aa..23ba31b07 100644
--- a/Version
+++ b/Version
@@ -4,4 +4,4 @@
 
 MAJOR_VERSION=4
 MINOR_VERSION=0
-SUBMINOR_VERSION=5
+SUBMINOR_VERSION=6