diff --git a/HISTORY.rst b/HISTORY.rst
index 7d4178e4..9274b86b 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -8,7 +8,7 @@ PlatformIO Core 5
 
 **A professional collaborative platform for embedded development**
 
-5.2.4 (2021-??-??)
+5.2.4 (2021-12-15)
 ~~~~~~~~~~~~~~~~~~
 
 - Added support for a new ``headers`` field in `library.json <https://docs.platformio.org/en/latest/librarymanager/config.html>`__ (declare a list of header files that can be included in a project source files using ``#include <...>`` directive)
diff --git a/docs b/docs
index 60dd6f2e..ba3fca21 160000
--- a/docs
+++ b/docs
@@ -1 +1 @@
-Subproject commit 60dd6f2e85a8c38fd737c81532644b039e15339b
+Subproject commit ba3fca21eab09226c194f0a23463b3c253d2e069
diff --git a/platformio/__init__.py b/platformio/__init__.py
index df4c9466..075823ca 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -14,7 +14,7 @@
 
 import sys
 
-VERSION = (5, 2, "4rc1")
+VERSION = (5, 2, 4)
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"