diff --git a/HISTORY.rst b/HISTORY.rst
index 2e4925da..5660956c 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -6,7 +6,7 @@ Release Notes
 PlatformIO Core 4
 -----------------
 
-4.2.1 (2020-02-??)
+4.2.1 (2020-02-17)
 ~~~~~~~~~~~~~~~~~~
 
 * Improved VSCode template with special ``forceInclude`` field for direct includes via ``-include`` flag (`issue #3379 <https://github.com/platformio/platformio-core/issues/3379>`_)
diff --git a/docs b/docs
index ecc392b0..4b50528d 160000
--- a/docs
+++ b/docs
@@ -1 +1 @@
-Subproject commit ecc392b0bd21a83043118c9d8d05147b85e453a1
+Subproject commit 4b50528d78ad3c5e36d149e275f20b5a7154e3a8
diff --git a/platformio/__init__.py b/platformio/__init__.py
index adcc9d7c..120df28d 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-VERSION = (4, 2, "1a3")
+VERSION = (4, 2, 1)
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"