diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1cf3e58..837dc10 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -91,7 +91,7 @@ jobs:
           # N.B.: We use an x86-64 Python for Windows ARM64 because this is what we ship with via
           # PBS, and we need to be able to resolve x86-64 compatible requirements (which include
           # native deps like psutil) for our shiv.
-          UV_PYTHON_VERSION=cpython-3.12.8-windows-x86_64-none
+          UV_PYTHON_VERSION=cpython-3.12.9-windows-x86_64-none
           "${UV}" python install ${UV_PYTHON_VERSION}
           echo UV_PYTHON="${UV_PYTHON_VERSION}" >> ${GITHUB_ENV}
       - name: Installing emulators
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f629fe6..6b0487a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -114,7 +114,7 @@ jobs:
           # N.B.: We use an x86-64 Python for Windows ARM64 because this is what we ship with via
           # PBS, and we need to be able to resolve x86-64 compatible requirements (which include
           # native deps like psutil) for our shiv.
-          UV_PYTHON_VERSION=cpython-3.12.8-windows-x86_64-none
+          UV_PYTHON_VERSION=cpython-3.12.9-windows-x86_64-none
           "${UV}" python install ${UV_PYTHON_VERSION}
           echo UV_PYTHON_ARGS="--python ${UV_PYTHON_VERSION}" >> ${GITHUB_ENV}
       - name: Installing emulators
diff --git a/.python-version b/.python-version
index 04e2079..f3fe474 100644
--- a/.python-version
+++ b/.python-version
@@ -1 +1 @@
-3.12.8
+3.12.9
diff --git a/CHANGES.md b/CHANGES.md
index 4b7a804..0eecc1b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,9 @@
 # Release Notes
 
+## 0.11.3
+
+Upgrade the science internal Python distribution to [PBS][PBS] CPython 3.12.9.
+
 ## 0.11.2
 
 This release fixes a bug introduced in the 0.11.0 release whereby a `ptex` binary was always
diff --git a/lift.toml b/lift.toml
index c326ab0..d1571a2 100644
--- a/lift.toml
+++ b/lift.toml
@@ -8,8 +8,8 @@ description = "Ship your interpreted executables using science."
 id = "cpython"
 provider = "PythonBuildStandalone"
 
-release = "20241206"
-version = "3.12.8"
+release = "20250205"
+version = "3.12.9"
 flavor = "install_only_stripped"
 
 # By default, science ships as a "thin" scie that fetches CPython 3.12 on first run.
diff --git a/science/__init__.py b/science/__init__.py
index 38f28ae..c53dcfd 100644
--- a/science/__init__.py
+++ b/science/__init__.py
@@ -3,6 +3,6 @@
 
 from packaging.version import Version
 
-__version__ = "0.11.2"
+__version__ = "0.11.3"
 
 VERSION = Version(__version__)