diff --git a/GFDL.adoc b/GFDL.adoc
index 467b9a7..3234215 100644
--- a/GFDL.adoc
+++ b/GFDL.adoc
@@ -5,7 +5,7 @@ Version 1.3, 3 November 2008
 
 
 Copyright (C) 2000, 2001, 2002, 2007, 2008 Free Software Foundation,
-Inc. <http://fsf.org/>
+Inc. <https://fsf.org/>
 
 Everyone is permitted to copy and distribute verbatim copies of this
 license document, but changing it is not allowed.
@@ -379,7 +379,7 @@ The Free Software Foundation may publish new, revised versions of the
 GNU Free Documentation License from time to time.  Such new versions
 will be similar in spirit to the present version, but may differ in
 detail to address new problems or concerns.  See
-http://www.gnu.org/copyleft/.
+https://www.gnu.org/copyleft/.
 
 Each version of the License is given a distinguishing version number.
 If the Document specifies that a particular numbered version of this
diff --git a/debian/copyright b/debian/copyright
index 7cf2667..d3f45c0 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -1,6 +1,6 @@
 Coryright for files in debian/* and all perl files (*.pl):
 
-    Copyright (C) 2017 - 2019 Proxmox Server Solutions GmbH
+    Copyright (C) 2017 - 2020 Proxmox Server Solutions GmbH
 
     This software is written by Proxmox Server Solutions GmbH
     <support@proxmox.com>
@@ -17,12 +17,12 @@ Coryright for files in debian/* and all perl files (*.pl):
 
     You should have received a copy of the GNU Affero General Public
     License along with this program.  If not, see
-    <http://www.gnu.org/licenses/>.
+    <https://www.gnu.org/licenses/>.
 
 
 All documentation files (*.adoc) are release under:
 
-    Copyright (C) 2017 - 2019 Proxmox Server Solutions GmbH
+    Copyright (C) 2017 - 2020 Proxmox Server Solutions GmbH
 
     Permission is granted to copy, distribute and/or modify this document
     under the terms of the GNU Free Documentation License, Version 1.3
diff --git a/docinfo.xml b/docinfo.xml
index 5a71583..b69dec6 100644
--- a/docinfo.xml
+++ b/docinfo.xml
@@ -1,8 +1,8 @@
 <!-- DocBook document information file for Proxmox VE asciidoc docs -->
 
 <authorgroup>
-  <corpauthor>Proxmox Server Solutions Gmbh
-  <ulink url="http://www.proxmox.com/"><citetitle>www.proxmox.com</citetitle></ulink>
+  <corpauthor>Proxmox Server Solutions GmbH
+  <ulink url="https://www.proxmox.com/"><citetitle>www.proxmox.com</citetitle></ulink>
   </corpauthor>
 </authorgroup>
 
diff --git a/pmg-copyright.adoc.in b/pmg-copyright.adoc.in
index a872fd1..3f66d78 100644
--- a/pmg-copyright.adoc.in
+++ b/pmg-copyright.adoc.in
@@ -15,4 +15,4 @@ Affero General Public License for more details.
 
 You should have received a copy of the GNU Affero General Public
 License along with this program.  If not, see
-http://www.gnu.org/licenses/
+https://www.gnu.org/licenses/
diff --git a/pmg-faq.adoc b/pmg-faq.adoc
index 2f24cf6..d2fc465 100644
--- a/pmg-faq.adoc
+++ b/pmg-faq.adoc
@@ -17,7 +17,7 @@ ADD NEW FAQS TO THE BOTTOM OF THIS SECTION TO MAINTAIN NUMBERING
 
 What distribution is {pmg} based on?::
 
-{pmg} is based on http://www.debian.org[Debian GNU/Linux]
+{pmg} is based on https://www.debian.org[Debian GNU/Linux]
 
 What license does the {pmg} project use?::
 
diff --git a/pmg-installation.adoc b/pmg-installation.adoc
index c6536cb..946e34e 100644
--- a/pmg-installation.adoc
+++ b/pmg-installation.adoc
@@ -19,7 +19,7 @@ it requires more detailed knowledge about {pmg} and Debian.
 Using the {pmg} Installation CD-ROM
 -----------------------------------
 
-You can download the ISO from http://www.proxmox.com. It includes the
+You can download the ISO from https://www.proxmox.com. It includes the
 following:
 
 * Complete operating system (Debian Linux, 64-bit)
@@ -279,7 +279,7 @@ Package Repositories
 --------------------
 
 All {debian} based systems use
-http://en.wikipedia.org/wiki/Advanced_Packaging_Tool[APT] as package
+https://en.wikipedia.org/wiki/Advanced_Packaging_Tool[APT] as package
 management tool. The list of repositories is defined in
 `/etc/apt/sources.list` and `.list` files found inside
 `/etc/apt/sources.d/`. Updates can be installed directly using
diff --git a/pmg-planning-deployment.adoc b/pmg-planning-deployment.adoc
index 2d4c791..23040cc 100644
--- a/pmg-planning-deployment.adoc
+++ b/pmg-planning-deployment.adoc
@@ -100,7 +100,7 @@ any of the following plattforms:
 
 * and others supporting Debian Linux as guest OS
 
-Please see http://www.proxmox.com for details.
+Please see https://www.proxmox.com for details.
 
 In order to get a benchmark from your hardware, just run 'pmgperf'
 after installation.
diff --git a/pmg-ssl-certificate.adoc b/pmg-ssl-certificate.adoc
index 3248013..525f45a 100644
--- a/pmg-ssl-certificate.adoc
+++ b/pmg-ssl-certificate.adoc
@@ -52,7 +52,7 @@ Test your new certificate by using your browser.
 NOTE: To transfer files from and to your Proxmox, you can use secure
 copy: If you desktop is Linux, you can use the `scp` command line
 tool. If your desktop PC is windows, please use a scp client like
-WinSCP (see http://winscp.net/).
+WinSCP (see https://winscp.net/).
 
 
 Change Certificate for Cluster Setups
diff --git a/pmg-usbstick.adoc b/pmg-usbstick.adoc
index ed34fb6..f226ea8 100644
--- a/pmg-usbstick.adoc
+++ b/pmg-usbstick.adoc
@@ -108,11 +108,11 @@ Instructions for Windows
 Download Etcher from https://etcher.io , select the ISO and your USB Drive.
 
 If this doesn't work, alternatively use the OSForensics USB
-installer from http://www.osforensics.com/portability.html
+installer from https://www.osforensics.com/portability.html
 
 
 Boot your server from USB media
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Connect your USB media to your server and make sure that the server
-boots from USB (see server BIOS). Then follow the installation wizard.
\ No newline at end of file
+boots from USB (see server BIOS). Then follow the installation wizard.