diff --git a/.qmake.conf b/.qmake.conf
index 1bf9543ac91a7f578b6796f54d6b635ea3418a80..f1a6177b61b30cf1839567281e051e40be5e540d 100644
--- a/.qmake.conf
+++ b/.qmake.conf
@@ -1,3 +1,3 @@
 load(qt_build_config)
 
-MODULE_VERSION = 5.12.3
+MODULE_VERSION = 5.12.4
diff --git a/dist/changes-5.12.4 b/dist/changes-5.12.4
new file mode 100644
index 0000000000000000000000000000000000000000..a285cd8e23444357af29ca7c49478705ce4da2a8
--- /dev/null
+++ b/dist/changes-5.12.4
@@ -0,0 +1,20 @@
+Qt 5.12.4 is a bug-fix release. It maintains both forward and backward
+compatibility (source and binary) with Qt 5.12.0 through 5.12.3.
+
+For more details, refer to the online documentation included in this
+distribution. The documentation is also available online:
+
+https://doc.qt.io/qt-5/index.html
+
+The Qt version 5.12 series is binary compatible with the 5.11.x series.
+Applications compiled for 5.11 will continue to run with 5.12.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+https://bugreports.qt.io/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
+
+ - This release contains only minor code improvements.
diff --git a/doc/src/legal/licensechanges.qdoc b/doc/src/legal/licensechanges.qdoc
index 40e78abe64813178c404dda4823f1350fb8231b7..1fdd4361233fa2ec43508d42bdccdfcd3189d888 100644
--- a/doc/src/legal/licensechanges.qdoc
+++ b/doc/src/legal/licensechanges.qdoc
@@ -34,6 +34,26 @@
     Changes in Qt and \l{Licenses Used in Qt}{Third Party Modules}
     released with Qt that are relevant to licensing.
 
+    \section1 Qt 5.12.4
+
+    \section2 Qt GUI Module
+
+    \l{LibPNG} got updated to upstream version 1.6.37.
+
+    \section2 Qt Core Module
+
+    \list
+        \li \l{PCRE2} got updated to upstream version 10.33
+        \li \l{PCRE2 - Stack-less Just-In-Time Compiler} got updated to
+            upstream version 10.33
+        \li \l{Unicode Common Locale Data Repository (CLDR)} got updated to
+            upstream version v35.1
+    \endlist
+
+    \section2 Qt SQL Module
+
+    \l{SQLite} got updated to upstream version 3.28.0.
+
     \section1 Qt 5.12.3
 
     \section2 Qt GUI Module
diff --git a/doc/src/platforms/linux.qdoc b/doc/src/platforms/linux.qdoc
index 26b8e86651ee636bfc087e0e18bca85ae1971b3c..9f61e3e327aee39e5bb33995b585d7617849dafa 100644
--- a/doc/src/platforms/linux.qdoc
+++ b/doc/src/platforms/linux.qdoc
@@ -292,6 +292,7 @@
     \li libxcb1-dev
     \li libx11-xcb-dev
     \li libxcb-glx0-dev
+    \li libxkbcommon-x11-dev
     \endlist
 
     Additionally, if you do not configure with -qt-xcb, you should also