diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd2d776..12d013c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,16 @@
 Note: the BigBuy API is not versioned and some endpoints are added or removed without notice. The removal of methods
 that call deleted endpoints is not considered a breaking change.
 
+## 3.19.0 (2023/09/11)
+
+* Add official support for Python 3.12-rc2
+
+### Breaking change
+
+* Remove the `mode` argument of the class constructor. This has been deprecated for almost a year, since 3.16.0.
+  Use `sandbox=True` to use the sandbox mode instead of `mode="sandbox"`. Note the class now defaults to production mode
+  rather than the sandbox.
+
 ## 3.18.1 (2023/07/27)
 
 * Add `get_order_delivery_notes` for the new `order/delivery-notes` route
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7962408..53ce14e 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -4,7 +4,7 @@
 
     poetry run pytest
 
-## Making a release
+## Make a release
 
 1. Update the CHANGELOG
 2. Update the version in `pyproject.toml` and in `bigbuy/__init__.py`
diff --git a/bigbuy/__init__.py b/bigbuy/__init__.py
index b74198e..140e059 100644
--- a/bigbuy/__init__.py
+++ b/bigbuy/__init__.py
@@ -6,7 +6,7 @@
 """
 
 __author__ = 'Bixoto <info@bixoto.com>'
-__version__ = '3.18.1'
+__version__ = '3.19.0'
 
 from .api import BigBuy
 from .exceptions import (
diff --git a/pyproject.toml b/pyproject.toml
index cb13f53..227a54b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pybigbuy"
-version = "3.18.1"
+version = "3.19.0"
 description = "BigBuy API client in Python"
 authors = ["Bixoto <info@bixoto.com>"]
 license = "MIT"