diff --git a/CHANGELOG.md b/CHANGELOG.md
index 483ca91a5e..4403405f90 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,13 +5,7 @@
 - Fixed bug that made identical Experiment steps with different end times crash ([#3516](https://github.com/pybamm-team/PyBaMM/pull/3516))
 - Fixed bug in calculation of theoretical energy that made it very slow ([#3506](https://github.com/pybamm-team/PyBaMM/pull/3506))
 
-# [v23.9rc1](https://github.com/pybamm-team/PyBaMM/tree/v23.9rc1) - 2023-11-15
-
-- Fixed a bug where the JaxSolver would fails when using GPU support with no input parameters ([#3423](https://github.com/pybamm-team/PyBaMM/pull/3423))
-- Make pybamm importable with minimal dependencies ([#3044](https://github.com/pybamm-team/PyBaMM/pull/3044), [#3475](https://github.com/pybamm-team/PyBaMM/pull/3475))
-- Fixed a bug where supplying an initial soc did not work with half cell models ([#3456](https://github.com/pybamm-team/PyBaMM/pull/3456))
-
-# [v23.9rc0](https://github.com/pybamm-team/PyBaMM/tree/v23.9rc0) - 2023-10-31
+# [v23.9](https://github.com/pybamm-team/PyBaMM/tree/v23.9) - 2023-10-31
 
 ## Features
 
@@ -30,6 +24,9 @@
 
 ## Bug fixes
 
+- Fixed a bug where the JaxSolver would fails when using GPU support with no input parameters ([#3423](https://github.com/pybamm-team/PyBaMM/pull/3423))
+- Make pybamm importable with minimal dependencies ([#3044](https://github.com/pybamm-team/PyBaMM/pull/3044), [#3475](https://github.com/pybamm-team/PyBaMM/pull/3475))
+- Fixed a bug where supplying an initial soc did not work with half cell models ([#3456](https://github.com/pybamm-team/PyBaMM/pull/3456))
 - Fixed a bug where empty lists passed to QuickPlot resulted in an IndexError and did not return a meaningful error message ([#3359](https://github.com/pybamm-team/PyBaMM/pull/3359))
 - Fixed a bug where there was a missing thermal conductivity in the thermal pouch cell models ([#3330](https://github.com/pybamm-team/PyBaMM/pull/3330))
 - Fixed a bug that caused incorrect results of “{Domain} electrode thickness change [m]” due to the absence of dimension for the variable `electrode_thickness_change`([#3329](https://github.com/pybamm-team/PyBaMM/pull/3329)).
diff --git a/CITATION.cff b/CITATION.cff
index b7f68164fc..44f1c5d407 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -24,6 +24,6 @@ keywords:
   - "expression tree"
   - "python"
   - "symbolic differentiation"
-version: "23.9rc1"
+version: "23.9"
 repository-code: "https://github.com/pybamm-team/PyBaMM"
 title: "Python Battery Mathematical Modelling (PyBaMM)"
diff --git a/docs/_static/versions.json b/docs/_static/versions.json
index 5c9bba7c17..675ecbcf88 100644
--- a/docs/_static/versions.json
+++ b/docs/_static/versions.json
@@ -9,6 +9,11 @@
         "version": "stable",
         "url": "https://docs.pybamm.org/en/stable/"
     },
+    {
+        "name": "v23.9",
+        "version": "23.9",
+        "url": "https://docs.pybamm.org/en/v23.9_a/"
+    },
     {
         "name": "v23.5",
         "version": "23.5",
diff --git a/pybamm/version.py b/pybamm/version.py
index e5cfaa0882..970be77f66 100644
--- a/pybamm/version.py
+++ b/pybamm/version.py
@@ -1 +1 @@
-__version__ = "23.9rc1"
+__version__ = "23.9"
diff --git a/vcpkg.json b/vcpkg.json
index de71a5a87d..f62c18ddd2 100644
--- a/vcpkg.json
+++ b/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "pybamm",
-  "version-string": "23.9rc1",
+  "version-string": "23.9",
   "dependencies": [
     "casadi",
     {