diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7f558cd..b69859b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,8 +10,8 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - '3.9'
-          - '3.13'
+          - '3.10'
+          - '3.14'
 
     steps:
       - name: Checkout Repository
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 94df31a..c6a4935 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -37,7 +37,7 @@ jobs:
       - name: Set up oldest tested Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.9"
+          python-version: "3.10"
 
       - name: Install Dependencies
         run: |
diff --git a/.github/workflows/supply-chain.yml b/.github/workflows/supply-chain.yml
index 8955a26..a5ee352 100644
--- a/.github/workflows/supply-chain.yml
+++ b/.github/workflows/supply-chain.yml
@@ -28,8 +28,8 @@ jobs:
     strategy:
       matrix:
         python-version:
-          - '3.9'
-          - '3.13'
+          - '3.10'
+          - '3.14'
 
     steps:
     - uses: actions/checkout@v4
diff --git a/poetry.lock b/poetry.lock
index f1e896e..840f694 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.1.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.2.1 and should not be changed by hand.
 
 [[package]]
 name = "cdo-local-uuid"
@@ -35,7 +35,7 @@ description = "Backport of PEP 654 (exception groups)"
 optional = false
 python-versions = ">=3.7"
 groups = ["dev"]
-markers = "python_version < \"3.11\""
+markers = "python_version == \"3.10\""
 files = [
     {file = "exceptiongroup-1.3.0-py3-none-any.whl", hash = "sha256:4d111e6e0c13d0644cad6ddaa7ed0261a0b36971f6d23e7ec9b4b9097da78a10"},
     {file = "exceptiongroup-1.3.0.tar.gz", hash = "sha256:b241f5885f560bc56a59ee63ca4c6a8bfa46ae4ad651af316d4e81817bb9fd88"},
@@ -208,7 +208,7 @@ description = "A lil' TOML parser"
 optional = false
 python-versions = ">=3.8"
 groups = ["dev"]
-markers = "python_version < \"3.11\""
+markers = "python_version == \"3.10\""
 files = [
     {file = "tomli-2.2.1-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:678e4fa69e4575eb77d103de3df8a895e1591b48e740211bd1067378c69e8249"},
     {file = "tomli-2.2.1-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:023aa114dd824ade0100497eb2318602af309e5a55595f76b626d6d9f3b7b0a6"},
@@ -270,5 +270,5 @@ files = [
 
 [metadata]
 lock-version = "2.1"
-python-versions = "^3.9"
-content-hash = "5279a0790b9794fc0f33f7725f59cf1ee43a3ab34bacd6d8672744bc7c5d3ca9"
+python-versions = "^3.10"
+content-hash = "bf532f23aa57b4a6a665e095d6f648edb6660e66f23a9f0c6143be031868905b"
diff --git a/pyproject.toml b/pyproject.toml
index ad773d8..094e964 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ classifiers = [
 
 [tool.poetry.dependencies]
 cdo-local-uuid = "^0.5.0"
-python = "^3.9"
+python = "^3.10"
 pytz = "^2025"
 
 [tool.poetry.group.dev.dependencies]