diff --git a/dev-requirements.txt b/dev-requirements.txt
index f38a575..13f6c68 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.9
+# This file is autogenerated by pip-compile with Python 3.11
 # by the following command:
 #
 #    pip-compile --extra=development --extra=docs --extra=testing --extra=ws --output-file=./dev-requirements.txt pyproject.toml
@@ -32,7 +32,6 @@ click==8.1.8
     # via
     #   black
     #   pip-tools
-    #   s2-python (pyproject.toml)
 colorama==0.4.6
     # via tox
 coverage[toml]==7.6.1
@@ -48,8 +47,6 @@ docutils==0.20.1
     #   sphinx
     #   sphinx-rtd-theme
     #   sphinx-tabs
-exceptiongroup==1.2.2
-    # via pytest
 filelock==3.16.1
     # via
     #   tox
@@ -62,11 +59,6 @@ idna==3.10
     # via requests
 imagesize==1.4.1
     # via sphinx
-importlib-metadata==8.5.0
-    # via
-    #   build
-    #   setuptools-scm
-    #   sphinx
 inflect==5.6.2
     # via datamodel-code-generator
 iniconfig==2.0.0
@@ -152,8 +144,6 @@ pytest-coverage==0.0
     # via s2-python (pyproject.toml)
 pytest-timer==1.0.0
     # via s2-python (pyproject.toml)
-pytz==2025.1
-    # via s2-python (pyproject.toml)
 pyyaml==6.0.2
     # via
     #   datamodel-code-generator
@@ -200,36 +190,18 @@ sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
 tomli==2.2.1
-    # via
-    #   black
-    #   build
-    #   coverage
-    #   datamodel-code-generator
-    #   mypy
-    #   pip-tools
-    #   pylint
-    #   pyproject-api
-    #   pytest
-    #   setuptools-scm
-    #   tox
+    # via datamodel-code-generator
 tomlkit==0.13.2
     # via pylint
 tox==4.24.1
     # via s2-python (pyproject.toml)
-types-pytz==2024.2.0.20241221
-    # via s2-python (pyproject.toml)
 typing-extensions==4.12.2
     # via
-    #   astroid
-    #   black
     #   mypy
     #   pydantic
     #   pydantic-core
-    #   pylint
     #   pyright
     #   s2-python (pyproject.toml)
-    #   setuptools-scm
-    #   tox
 urllib3==2.2.3
     # via requests
 virtualenv==20.29.2
@@ -240,8 +212,6 @@ websockets==13.1
     # via s2-python (pyproject.toml)
 wheel==0.45.1
     # via pip-tools
-zipp==3.20.2
-    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip
diff --git a/pyproject.toml b/pyproject.toml
index e546a09..d8fe0bb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,8 +15,6 @@ license-files = ["LICENSE"]
 requires-python = ">=3.9, < 3.14"
 dependencies = [
     "pydantic>=2.8.2",
-    "pytz",
-    "click",
     "typing-extensions",
 ]
 classifiers = [
@@ -25,7 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3.13",    
+    "Programming Language :: Python :: 3.13",
 ]
 
 [tool.setuptools_scm]
@@ -44,7 +42,6 @@ testing = [
     "pytest-coverage",
     "pytest-timer",
     "mypy",
-    "types-pytz",
     "pylint",
     "pyright",
 ]
diff --git a/tests/unit/common/instruction_status_update_test.py b/tests/unit/common/instruction_status_update_test.py
index 91b81f2..49ba690 100644
--- a/tests/unit/common/instruction_status_update_test.py
+++ b/tests/unit/common/instruction_status_update_test.py
@@ -3,7 +3,7 @@
 import uuid
 from unittest import TestCase
 
-from pytz import timezone
+from zoneinfo import ZoneInfo
 
 from s2python.common import InstructionStatusUpdate, InstructionStatus
 
@@ -44,9 +44,7 @@ def test__to_json__happy_path(self):
             message_id=uuid.UUID("2bdec96b-be3b-4ba9-afa0-c4a0632cced3"),
             instruction_id=uuid.UUID("2bdec96b-be3b-4ba9-afa0-c4a0632cced4"),
             status_type=InstructionStatus.SUCCEEDED,
-            timestamp=timezone("Europe/Amsterdam").localize(
-                datetime(2023, 8, 2, 12, 48, 42)
-            ),
+            timestamp=datetime(2023, 8, 2, 12, 48, 42, tzinfo=ZoneInfo("Europe/Amsterdam")),
         )
 
         # Act