diff --git a/HISTORY.rst b/HISTORY.rst
index 32057b5..f34463b 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -1,3 +1,8 @@
+0.16.4 (2023-04-24)
+-------------------
+
+- Release using `Trusted Publishing <https://blog.pypi.org/posts/2023-04-20-introducing-trusted-publishers/>`_.
+
 0.16.3 (2023-03-31)
 -------------------
 
diff --git a/setup.cfg b/setup.cfg
index 1d1e871..72c9769 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,7 +1,7 @@
 [metadata]
 name = PyPAC
 # attr: pypac.__version__ via AST added in setuptools 46.4+, which doesn't support PY27.
-version = 0.16.3
+version = 0.16.4
 author = Carson Lam
 author_email = 46059+carsonyl@users.noreply.github.com
 description = Proxy auto-config and auto-discovery for Python.