diff --git a/.black.cfg.toml b/.black.cfg.toml
index aca538bf..31e51fb9 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']
+target-version = ['py39', 'py310', 'py311', 'py312', 'py313']
diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index f1e1c45f..db66902b 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.60.0
+current_version = 0.61.0
 commit = True
 tag = False
 message = chore: Bump version from {current_version} to {new_version}
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index a23b1919..33ad8b4d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -30,6 +30,9 @@ jobs:
         python_version:
           - "3.9"
           - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
 
     steps:
       - name: Check Out VCS Repository
@@ -85,6 +88,9 @@ jobs:
         python_version:
           - "3.9"
           - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
 
     steps:
       - name: Check Out VCS Repository
diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index 97db5c26..877616d9 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: "3.10"
+          python-version: "3.13"
 
       - name: Restoring/Saving Cache
         uses: actions/cache@v4.3.0
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index a180543a..ce517cd6 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: "3.10"
+          python-version: "3.13"
 
       - name: Create Python Virtual Environment
         run: make python-virtualenv PYTHON_VIRTUALENV_DIR="venv"
diff --git a/HISTORY.md b/HISTORY.md
index a3cd39a3..2efb2e29 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,13 @@
 # History
 
+## 0.61.0 (2025-10-29)
+
+- (PR #916, 2025-10-29) Add support for Python 3.11
+- (PR #918, 2025-10-29) Add Python 3.11 to target versions of 'Black'
+- (PR #919, 2025-10-29) Add support for Python 3.12
+- (PR #920, 2025-10-29) deps: Update `cffi` from 1.16.0 to 1.17.1
+- (PR #921, 2025-10-29) Add support for Python 3.13
+
 ## 0.60.0 (2025-10-20)
 
 - (PR #913, 2025-10-15) rcv: Refactor and extend parsing for "Otros Impuestos" field
diff --git a/README.md b/README.md
index d44ee39f..5b7b1888 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 and 3.10. 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, 3.12, and 3.13. 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 e6b64ecb..9aabaad9 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, <3.11"
+requires-python = ">=3.9, <3.14"
 authors = [
   {name = "Fyntex TI SpA", email = "no-reply@fyntex.ai"},
 ]
@@ -44,6 +44,9 @@ classifiers = [
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
 ]
 dynamic = ["version"]
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 032a1c5c..9a959d92 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -26,7 +26,7 @@ certifi==2024.7.4
     # via
     #   -c requirements.txt
     #   requests
-cffi==1.16.0
+cffi==1.17.1
     # via
     #   -c requirements.txt
     #   cryptography
diff --git a/requirements.txt b/requirements.txt
index 3621ffaa..caefdf10 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ backports-datetime-fromisoformat==2.0.3
     # via marshmallow
 certifi==2024.7.4
     # via signxml
-cffi==1.16.0
+cffi==1.17.1
     # via cryptography
 cryptography==45.0.7
     # via
diff --git a/src/cl_sii/__init__.py b/src/cl_sii/__init__.py
index 97d64fe5..748de295 100644
--- a/src/cl_sii/__init__.py
+++ b/src/cl_sii/__init__.py
@@ -4,4 +4,4 @@
 
 """
 
-__version__ = '0.60.0'
+__version__ = '0.61.0'
diff --git a/src/tests/test_libs_tz_utils.py b/src/tests/test_libs_tz_utils.py
index a86c6710..af24c497 100644
--- a/src/tests/test_libs_tz_utils.py
+++ b/src/tests/test_libs_tz_utils.py
@@ -1,5 +1,6 @@
 import datetime
 import re
+import sys
 import unittest
 
 from cl_sii.libs.tz_utils import (  # noqa: F401
@@ -74,7 +75,12 @@ def test_validate_dt_tz_tzinfo_zone_attribute_check(self) -> None:
         )
         with self.assertRaisesRegex(AssertionError, expected_error_message):
             validate_dt_tz(dt_with_tzinfo_utc_pytz, tzinfo_utc_stdlib)
-        expected_error_message = re.compile(r"^Object UTC must have 'zone' attribute.$")
+        if sys.version_info >= (3, 11):
+            expected_error_message = re.compile(
+                r"^Object datetime.timezone.utc must have 'zone' attribute.$"
+            )
+        else:
+            expected_error_message = re.compile(r"^Object UTC must have 'zone' attribute.$")
         with self.assertRaisesRegex(AssertionError, expected_error_message):
             validate_dt_tz(dt_with_tzinfo_utc_stdlib, tzinfo_utc_pytz)
 
@@ -86,8 +92,15 @@ def test_validate_dt_tz_tzinfo_zone_attribute_check(self) -> None:
         )
         with self.assertRaisesRegex(AssertionError, expected_error_message):
             validate_dt_tz(dt_with_tzinfo_not_utc_pytz, tzinfo_not_utc_stdlib)  # type: ignore
-        expected_error_message = re.compile(
-            r"^Object" r" UTC-03:00" r" must have 'zone' attribute.$"
-        )
+        if sys.version_info >= (3, 11):
+            expected_error_message = re.compile(
+                r"^Object"
+                r" datetime.timezone\(datetime.timedelta\(days=-1, seconds=75600\)\)"
+                r" must have 'zone' attribute.$"
+            )
+        else:
+            expected_error_message = re.compile(
+                r"^Object" r" UTC-03:00" r" must have 'zone' attribute.$"
+            )
         with self.assertRaisesRegex(AssertionError, expected_error_message):
             validate_dt_tz(dt_with_tzinfo_not_utc_stdlib, tzinfo_not_utc_pytz)
diff --git a/tox.ini b/tox.ini
index c62778c7..b8da266f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,6 +2,9 @@
 envlist =
     py39,
     py310,
+    py311,
+    py312,
+    py313,
 
 [testenv]
 setenv =
@@ -13,3 +16,6 @@ deps =
 basepython =
     py39: python3.9
     py310: python3.10
+    py311: python3.11
+    py312: python3.12
+    py313: python3.13