diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
index 67894ae..3a7d532 100644
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -70,7 +70,7 @@ members of the project's leadership.
 ## Attribution
 
 This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
-available at [http://contributor-covenant.org/version/1/4][version]
+available at [https://contributor-covenant.org/version/1/4][version]
 
-[homepage]: http://contributor-covenant.org
-[version]: http://contributor-covenant.org/version/1/4/
+[homepage]: https://contributor-covenant.org
+[version]: https://contributor-covenant.org/version/1/4/
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 14ee84e..a2c430c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -7,9 +7,9 @@ Please note that this repository is specifically for the scripts and infrastruct
 When developing new features, it is important to make sure that they work on all our supported platforms.  Right now, this means Windows >= 7 (with PowerShell >= 3), macOS >= 10.7, and Linux.  We would like to also support *BSD, but do not currently have a means to test this.
 
 Some issues to be aware of include:
-* Use http://www.shellcheck.net/ to confirm POSIX compatibility of *.sh scripts.
+* Use https://www.shellcheck.net/ to confirm POSIX compatibility of *.sh scripts.
 * Avoid non-standard gnu extensions to common Unix tools (e.g. the `-f` flag from GNU `readlink`)
 
 While your pull-request is in review it will be helpful if you join IRC to discuss the changes.
 
-See also the in-depth guide on [contributing](https://github.com/OpenRA/OpenRA/wiki/Contributing) on the main OpenRA project wiki.  Most of the content on this page also applies to the Mod SDK.
\ No newline at end of file
+See also the in-depth guide on [contributing](https://github.com/OpenRA/OpenRA/wiki/Contributing) on the main OpenRA project wiki.  Most of the content on this page also applies to the Mod SDK.
diff --git a/COPYING b/COPYING
index 94a9ed0..e600086 100644
--- a/COPYING
+++ b/COPYING
@@ -1,7 +1,7 @@
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -645,7 +645,7 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -664,11 +664,11 @@ might be different; for a GUI interface, you would use an "about box".
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
+<https://www.gnu.org/licenses/>.
 
   The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+<https://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/mod.config b/mod.config
index 4f42e22..6f1213d 100644
--- a/mod.config
+++ b/mod.config
@@ -40,10 +40,10 @@ PACKAGING_DISPLAY_NAME="Example Mod"
 # The URL for the project homepage.
 # This is used in:
 #  - Windows "Add/Remove Programs" list
-PACKAGING_WEBSITE_URL="http://openra.net"
+PACKAGING_WEBSITE_URL="https://openra.net"
 
 # The URL that is displayed in the crash dialog.
-PACKAGING_FAQ_URL="http://wiki.openra.net/FAQ"
+PACKAGING_FAQ_URL="https://wiki.openra.net/FAQ"
 
 # The human-readable project authors.
 # This is used in:
diff --git a/packaging/functions.sh b/packaging/functions.sh
index fef9189..64b9524 100644
--- a/packaging/functions.sh
+++ b/packaging/functions.sh
@@ -3,7 +3,7 @@
 
 ####
 # This file must stay /bin/sh and POSIX compliant for macOS and BSD portability.
-# Copy-paste the entire script into http://shellcheck.net to check.
+# Copy-paste the entire script into https://shellcheck.net to check.
 ####
 
 # Compile and publish any mod assemblies to the target directory
diff --git a/packaging/windows/buildpackage.nsi b/packaging/windows/buildpackage.nsi
index c254896..0155cf1 100644
--- a/packaging/windows/buildpackage.nsi
+++ b/packaging/windows/buildpackage.nsi
@@ -12,7 +12,7 @@
 ;  GNU General Public License for more details.
 ;
 ;  You should have received a copy of the GNU General Public License
-;  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+;  along with OpenRA.  If not, see <https://www.gnu.org/licenses/>.
 
 
 !include "MUI2.nsh"