diff --git a/NEWS.md b/NEWS.md
index dee1eef6b..1aec8144c 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,6 +4,8 @@
 
 * The MKVToolNix project now contains a
   [Code of Coduct](https://mkvtoolnix.download/doc/CODE_OF_CONDUCT.md).
+* The MKVToolNix project's source code repository, bug tracker and wiki have
+  been moved to [GitLab](https://gitlab.com/mbunkus/mkvtoolnix/).
 
 ## New features and enhancements
 
diff --git a/README.md b/README.md
index 8aa45eb2d..d83c1a4bc 100644
--- a/README.md
+++ b/README.md
@@ -162,7 +162,7 @@ for both Unix/Linux and Windows.
 
 First clone my Git repository with this command:
 
-    git clone https://github.com/mbunkus/mkvtoolnix.git
+    git clone https://gitlab.com/mbunkus/mkvtoolnix.git
 
 Now change to the MKVToolNix directory with `cd mkvtoolnix` and run
 `./autogen.sh` which will generate the "configure" script. You need
@@ -230,7 +230,7 @@ If you're sure you've found a bug — e.g. if one of my programs crashes
 with an obscur error message, or if the resulting file is missing part
 of the original data, then by all means submit a bug report.
 
-I use [GitHub's issue system](https://github.com/mbunkus/mkvtoolnix/issues)
+I use [GitLab's issue system](https://gitlab.com/mbunkus/mkvtoolnix/issues)
 as my bug database. You can submit your bug reports there. Please be as
 verbose as possible — e.g. include the command line, if you use Windows
 or Linux etc.pp.
@@ -239,7 +239,7 @@ If at all possible, please include sample files as well so that I can
 reproduce the issue. If they are larger than 1 MB, please upload
 them somewhere and post a link in the issue. You can also upload them
 to my FTP server. Details on how to connect can be found in the
-[MKVToolNix FAQ](https://github.com/mbunkus/mkvtoolnix/wiki/FTP-server).
+[MKVToolNix FAQ](https://gitlab.com/mbunkus/mkvtoolnix/wikis/FTP-server).
 
 # 4. Test suite and continuous integration tests
 
diff --git a/configure.ac b/configure.ac
index a18640ea5..724c3c1b9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([MKVToolNix],[18.0.0],[https://github.com/mbunkus/mkvtoolnix/issues/],[mkvtoolnix])
+AC_INIT([MKVToolNix],[18.0.0],[https://gitlab.com/mbunkus/mkvtoolnix/issues/],[mkvtoolnix])
 AC_PREREQ(2.50)
 
 AC_CONFIG_HEADERS(config.h:config.h.in)
diff --git a/src/mkvtoolnix-gui/main_window/available_update_info_dialog.cpp b/src/mkvtoolnix-gui/main_window/available_update_info_dialog.cpp
index 98fbcd3c6..70e3a6d8b 100644
--- a/src/mkvtoolnix-gui/main_window/available_update_info_dialog.cpp
+++ b/src/mkvtoolnix-gui/main_window/available_update_info_dialog.cpp
@@ -137,7 +137,7 @@ AvailableUpdateInfoDialog::updateReleasesInfoDisplay() {
   auto reBug             = boost::regex{"(#\\d+)", boost::regex::perl | boost::regex::icase};
   auto bugFormatter      = [](boost::smatch const &matches) -> std::string {
     auto number_str = matches[1].str().substr(1);
-    return (boost::format("<a href=\"https://github.com/mbunkus/mkvtoolnix/issues/%1%\">#%1%</a>") % number_str).str();
+    return (boost::format("<a href=\"https://gitlab.com/mbunkus/mkvtoolnix/issues/%1%\">#%1%</a>") % number_str).str();
   };
 
   releases.sort();
diff --git a/src/mkvtoolnix-gui/main_window/main_window.cpp b/src/mkvtoolnix-gui/main_window/main_window.cpp
index 9dccab08d..2fb92eb86 100644
--- a/src/mkvtoolnix-gui/main_window/main_window.cpp
+++ b/src/mkvtoolnix-gui/main_window/main_window.cpp
@@ -235,11 +235,11 @@ void
 MainWindow::setupHelpURLs() {
   Q_D(MainWindow);
 
-  d->helpURLs[d->ui->actionHelpFAQ]                   = "https://github.com/mbunkus/mkvtoolnix/wiki";
-  d->helpURLs[d->ui->actionHelpKnownProblems]         = "https://github.com/mbunkus/mkvtoolnix/wiki/Troubleshooting";
+  d->helpURLs[d->ui->actionHelpFAQ]                   = "https://gitlab.com/mbunkus/mkvtoolnix/wikis";
+  d->helpURLs[d->ui->actionHelpKnownProblems]         = "https://gitlab.com/mbunkus/mkvtoolnix/wikis/Troubleshooting";
   d->helpURLs[d->ui->actionHelpMkvmergeDocumentation] = "https://mkvtoolnix.download/doc/mkvmerge.html";
   d->helpURLs[d->ui->actionHelpWebSite]               = "https://mkvtoolnix.download/";
-  d->helpURLs[d->ui->actionHelpReportBug]             = "https://github.com/mbunkus/mkvtoolnix/issues/";
+  d->helpURLs[d->ui->actionHelpReportBug]             = "https://gitlab.com/mbunkus/mkvtoolnix/issues/";
 }
 
 void