diff --git a/.black.cfg.toml b/.black.cfg.toml
index a38c1f28..aefe722f 100644
--- a/.black.cfg.toml
+++ b/.black.cfg.toml
@@ -9,4 +9,4 @@
 include = '\.pyi?$'
 line-length = 100
 skip-string-normalization = true
-target-version = ['py39', 'py310', 'py311']
+target-version = ['py39', 'py310', 'py311', 'py312']
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 7336bc4a..bfe02f48 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -31,6 +31,7 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11"
+          - "3.12"
 
     steps:
       - name: Check Out VCS Repository
@@ -87,6 +88,7 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11"
+          - "3.12"
 
     steps:
       - name: Check Out VCS Repository
diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index eb910aba..50469ded 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -44,7 +44,7 @@ jobs:
         id: set_up_python
         uses: actions/setup-python@v6.0.0
         with:
-          python-version: "3.11"
+          python-version: "3.12"
 
       - name: Restoring/Saving Cache
         uses: actions/cache@v4.3.0
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index f2225d7e..03cdd92f 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -41,7 +41,7 @@ jobs:
         id: set_up_python
         uses: actions/setup-python@v6.0.0
         with:
-          python-version: "3.11"
+          python-version: "3.12"
 
       - name: Create Python Virtual Environment
         run: make python-virtualenv PYTHON_VIRTUALENV_DIR="venv"
diff --git a/README.md b/README.md
index 200744ad..931f18a6 100644
--- a/README.md
+++ b/README.md
@@ -31,8 +31,8 @@ The full documentation is at <https://lib-cl-sii-python.readthedocs.io>.
 
 ## Supported Python versions
 
-Only Python 3.9, 3.10, and 3.11. Python 3.8 and below will not work because we use some features
-introduced in Python 3.9.
+Only Python 3.9, 3.10, 3.11, and 3.12. Python 3.8 and below will not work because we use some
+features introduced in Python 3.9.
 
 ## Quickstart
 
diff --git a/pyproject.toml b/pyproject.toml
index 90e7ad24..71e894e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ dependencies = [
   "signxml>=4.0.0",
   "typing-extensions>=4.0.1",
 ]
-requires-python = ">=3.9, <3.12"
+requires-python = ">=3.9, <3.13"
 authors = [
   {name = "Fyntex TI SpA", email = "no-reply@fyntex.ai"},
 ]
@@ -45,6 +45,7 @@ classifiers = [
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
 ]
 dynamic = ["version"]
 
diff --git a/tox.ini b/tox.ini
index cfeac9c0..502a578b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,6 +3,7 @@ envlist =
     py39,
     py310,
     py311,
+    py312,
 
 [testenv]
 setenv =
@@ -15,3 +16,4 @@ basepython =
     py39: python3.9
     py310: python3.10
     py311: python3.11
+    py312: python3.12