diff --git a/Lib/fontTools/__init__.py b/Lib/fontTools/__init__.py
index 0db40fcf7..2702fc5f8 100644
--- a/Lib/fontTools/__init__.py
+++ b/Lib/fontTools/__init__.py
@@ -4,6 +4,6 @@ from fontTools.misc.loggingTools import configLogger
 
 log = logging.getLogger(__name__)
 
-version = __version__ = "4.2.3.dev0"
+version = __version__ = "4.2.3"
 
 __all__ = ["version", "log", "configLogger"]
diff --git a/NEWS.rst b/NEWS.rst
index e80cc334a..00fb8485e 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -1,3 +1,6 @@
+4.2.3 (released 2020-01-07)
+---------------------------
+
 - [otTables] Fixed bug when splitting `MarkBasePos` subtables as offsets overflow.
   The mark class values in the split subtable were not being updated, leading to
   invalid mark-base attachments (#1797, googlefonts/noto-source#145).
diff --git a/setup.cfg b/setup.cfg
index 64283d5bf..403eefe8f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 4.2.3.dev0
+current_version = 4.2.3
 commit = True
 tag = False
 tag_name = {new_version}
diff --git a/setup.py b/setup.py
index a188d599a..17033d1fa 100755
--- a/setup.py
+++ b/setup.py
@@ -345,7 +345,7 @@ def find_data_files(manpath="share/man"):
 
 setup(
 	name="fonttools",
-	version="4.2.3.dev0",
+	version="4.2.3",
 	description="Tools to manipulate font files",
 	author="Just van Rossum",
 	author_email="just@letterror.com",