diff --git a/.github/workflows/build_and_test.yml b/.github/workflows/build_and_test.yml
index cdb6b713c0c..4d166b6fcb0 100644
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -36,7 +36,7 @@ jobs:
     - uses: actions/setup-python@v4
       id: setup_python
       with:
-        python-version: '3.11'
+        python-version: '3.12'
 
     - uses: actions/cache@v3
       with:
@@ -84,7 +84,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.8', '3.9', '3.10', '3.11', '3.12' ]
     uses: ./.github/workflows/build-wheels-linux.yml
     with:
       python-version: ${{ matrix.python-version }}
@@ -93,7 +93,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.8', '3.9', '3.10', '3.11', '3.12' ]
     uses: ./.github/workflows/build-wheels-macos.yml
     with:
       python-version: ${{ matrix.python-version }}
@@ -104,7 +104,7 @@ jobs:
       fail-fast: false
       matrix:
         test-type: [ 'integration-tests', 'unit-tests', 'gui-test' ]
-        python-version: [ '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.8', '3.9', '3.10', '3.11', '3.12' ]
         os: [ ubuntu-latest ]
         exclude:
           - os: ubuntu-latest
@@ -113,6 +113,9 @@ jobs:
           - os: ubuntu-latest
             python-version: '3.10'
             test-type: 'gui-test'
+          - os: ubuntu-latest
+            python-version: '3.11'
+            test-type: 'gui-test'
     uses: ./.github/workflows/test_ert.yml
     with:
       os: ${{ matrix.os }}
@@ -125,7 +128,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        python-version: [ '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.8', '3.9', '3.10', '3.11', '3.12' ]
     uses: ./.github/workflows/test_ert_with_slurm.yml
     with:
       os: ${{ matrix.os }}
@@ -151,7 +154,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.11']
+        python-version: ['3.12']
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
 
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 4a2d53cc110..7322c7d82ba 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -27,7 +27,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: '3.11'
+        python-version: '3.12'
 
     - name: Install with dependencies
       run: |
diff --git a/.github/workflows/doctest.yml b/.github/workflows/doctest.yml
index c3d8d2728a9..0597570ba6e 100644
--- a/.github/workflows/doctest.yml
+++ b/.github/workflows/doctest.yml
@@ -21,7 +21,7 @@ jobs:
       uses: actions/setup-python@v4
       id: setup_python
       with:
-        python-version: '3.11'
+        python-version: '3.12'
         cache: "pip"
         cache-dependency-path: |
           setup.py
diff --git a/.github/workflows/run_ert_test_data_setups.yml b/.github/workflows/run_ert_test_data_setups.yml
index 4edaf02d22b..426b01219de 100644
--- a/.github/workflows/run_ert_test_data_setups.yml
+++ b/.github/workflows/run_ert_test_data_setups.yml
@@ -20,11 +20,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.8', '3.10', '3.11']
+        python-version: ['3.8', '3.10', '3.11', '3.12']
         os: [ubuntu-latest, macos-latest]
         exclude:
         - python-version: '3.8'
           os: macos-latest
+        - python-version: '3.10'
+          os: macos-latest
         - python-version: '3.11'
           os: macos-latest
 
diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index 05ab75549c1..108ec7ca16a 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.11']
+        python-version: ['3.12']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/test_semeio.yml b/.github/workflows/test_semeio.yml
index 01688470e87..2ee928a77bd 100644
--- a/.github/workflows/test_semeio.yml
+++ b/.github/workflows/test_semeio.yml
@@ -22,7 +22,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: '3.11'
+        python-version: '3.12'
 
     - name: Install ert
       run: |
diff --git a/.github/workflows/typing.yml b/.github/workflows/typing.yml
index 9c5cf037fa0..730c5880e7d 100644
--- a/.github/workflows/typing.yml
+++ b/.github/workflows/typing.yml
@@ -13,7 +13,7 @@ jobs:
     timeout-minutes: 15
     strategy:
       matrix:
-        python-version: ['3.11']
+        python-version: ['3.12']
 
     steps:
     - uses: actions/checkout@v4
diff --git a/ci/github/build_linux_wheel.sh b/ci/github/build_linux_wheel.sh
index 5241a7a6c5b..898352758ba 100755
--- a/ci/github/build_linux_wheel.sh
+++ b/ci/github/build_linux_wheel.sh
@@ -6,6 +6,7 @@ case "$1" in
     3.9) pyver=cp39-cp39 ;;
     3.10) pyver=cp310-cp310 ;;
     3.11) pyver=cp311-cp311 ;;
+    3.12) pyver=cp312-cp312 ;;
     *)
         echo "Unknown Python version $1"
         exit 1
diff --git a/pyproject.toml b/pyproject.toml
index 58346b221d8..77f912aa020 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,6 +32,7 @@ classifiers=[
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Topic :: Scientific/Engineering",
     "Topic :: Scientific/Engineering :: Physics",
 ]