diff --git a/doc/changelog.rst b/doc/changelog.rst
index 5b89aafb90..92c54ae1f5 100644
--- a/doc/changelog.rst
+++ b/doc/changelog.rst
@@ -1,6 +1,21 @@
 Changelog
 =========
 
+Changes in Version 3.12.3
+-------------------------
+
+Issues Resolved
+...............
+
+Version 3.12.3 fixes a bug that prevented :meth:`bson.json_util.loads` from
+decoding a document with a non-string "$regex" field (`PYTHON-3028`_).
+
+See the `PyMongo 3.12.3 release notes in JIRA`_ for the list of resolved issues
+in this release.
+
+.. _PYTHON-3028: https://jira.mongodb.org/browse/PYTHON-3028
+.. _PyMongo 3.12.3 release notes in JIRA: https://jira.mongodb.org/secure/ReleaseNote.jspa?projectId=10004&version=32505
+
 Changes in Version 3.12.2
 -------------------------
 
diff --git a/pymongo/__init__.py b/pymongo/__init__.py
index a5aef43fd4..406984e824 100644
--- a/pymongo/__init__.py
+++ b/pymongo/__init__.py
@@ -99,7 +99,7 @@
    Deprecated
 """
 
-version_tuple = (3, 12, 3, '.dev0')
+version_tuple = (3, 12, 3)
 
 def get_version_string():
     if isinstance(version_tuple[-1], str):
diff --git a/setup.py b/setup.py
index 539e63af87..b1715f31e9 100755
--- a/setup.py
+++ b/setup.py
@@ -43,7 +43,7 @@
     except ImportError:
         _HAVE_SPHINX = False
 
-version = "3.12.3.dev0"
+version = "3.12.3"
 
 f = open("README.rst")
 try: