diff --git a/.github/workflows/build_workflow.yml b/.github/workflows/build_workflow.yml
index 00773abcb..79661553c 100644
--- a/.github/workflows/build_workflow.yml
+++ b/.github/workflows/build_workflow.yml
@@ -51,7 +51,7 @@ jobs:
         shell: bash -l {0}
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
     steps:
       - id: skip_check
         uses: fkirc/skip-duplicate-actions@master
diff --git a/deploy/conda-dev-spec.template b/deploy/conda-dev-spec.template
index d22439ea8..76f0ff4c3 100644
--- a/deploy/conda-dev-spec.template
+++ b/deploy/conda-dev-spec.template
@@ -2,7 +2,7 @@
 # $ conda create --name <env> --file <this file>
 
 # Base
-python>=3.9,<3.12
+python>=3.9,<=3.12
 antimeridian
 cartopy
 cartopy_offlinedata
diff --git a/deploy/default.cfg b/deploy/default.cfg
index 8180be408..9ac940c4f 100644
--- a/deploy/default.cfg
+++ b/deploy/default.cfg
@@ -14,7 +14,7 @@ recreate = False
 suffix =
 
 # the python version
-python = 3.11
+python = 3.12
 
 # the MPI version (nompi, mpich or openmpi)
 mpi = nompi
diff --git a/docs/users_guide/quick_start.md b/docs/users_guide/quick_start.md
index 04ef3af05..6c01b6284 100644
--- a/docs/users_guide/quick_start.md
+++ b/docs/users_guide/quick_start.md
@@ -73,7 +73,7 @@ if you don't already have it.  Then, create a new conda environment (called
 `polaris` in this example) as follows:
 
 ```bash
-conda create -n polaris -c conda-forge -c e3sm/label/polaris python=3.11 \
+conda create -n polaris -c conda-forge -c e3sm/label/polaris python=3.12 \
     "polaris=*=mpi_mpich*"
 ```
 
@@ -85,7 +85,7 @@ system with its own MPI), use `"polaris=*=nompi*"`
 To get a specific version of polaris, you can instead run:
 
 ```bash
-conda create -n polaris -c conda-forge -c e3sm/label/polaris python=3.11 \
+conda create -n polaris -c conda-forge -c e3sm/label/polaris python=3.12 \
     "polaris=1.0.0=mpi_mpich*"
 ```
 
diff --git a/setup.cfg b/setup.cfg
index fb2c5d124..3cddead30 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -15,13 +15,14 @@ classifiers =
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     License :: OSI Approved :: BSD License
     Operating System :: OS Independent
 
 [options]
 packages = find:
 include_package_data = True
-python_requires = >=3.9,<3.12
+python_requires = >=3.9,<=3.12
 install_requires =
     cartopy
     cmocean