diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c398350..8fc9c0e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -41,7 +41,6 @@ jobs:
     strategy:
       matrix:
         python:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
diff --git a/pyproject.toml b/pyproject.toml
index 05e69b5..4bc1753 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,14 +10,13 @@ authors = [{ name = "InstructLab", email = "dev@instructlab.ai" }]
 description = "InstructLab Taxonomy Schema"
 readme = "README.md"
 license = { text = "Apache-2.0" }
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 classifiers = [
     "Development Status :: 4 - Beta",
     "License :: OSI Approved :: Apache Software License",
     "Operating System :: OS Independent",
     "Topic :: Scientific/Engineering :: Artificial Intelligence",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -34,11 +33,11 @@ version_file = "src/instructlab/schema/_version.py"
 local_scheme = "no-local-version"                   # do not include +gREV local version, required for Test PyPI upload
 
 [tool.mypy]
-python_version = "3.9"
+python_version = "3.10"
 exclude = ["^src/instructlab/schema/_version\\.py$"]
 
 [tool.ruff]
-target-version = "py39"
+target-version = "py310"
 src = ["src", "tests"]
 extend-exclude = ["src/instructlab/schema/_version.py"]
 
@@ -55,7 +54,7 @@ select = [
 ]
 
 [tool.pylint.main]
-py-version = "3.9"
+py-version = "3.10"
 source-roots = ["src", "tests"]
 ignore = ["_version.py"]
 
diff --git a/src/instructlab/schema/__init__.py b/src/instructlab/schema/__init__.py
index 5ac6fdc..a1bc1f2 100644
--- a/src/instructlab/schema/__init__.py
+++ b/src/instructlab/schema/__init__.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 """InstructLab Taxonomy Schema"""
 
 # Standard
@@ -5,7 +7,7 @@
 
 try:
     from importlib.resources.abc import Traversable  # type: ignore[import-not-found]
-except ImportError:  # python>=3.9,<3.11
+except ImportError:  # python<3.11
     from importlib.abc import Traversable
 
 __all__ = ["schema_versions"]
diff --git a/tox.ini b/tox.ini
index 2847d8a..1c4e721 100644
--- a/tox.ini
+++ b/tox.ini
@@ -60,4 +60,3 @@ python =
     3.12 = py312-unit
     3.11 = py311-unit
     3.10 = py310-unit
-    3.9 = py39-unit