diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 3a4d53e6..77ded4f0 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -3,13 +3,12 @@
 {
   "name": "Python 3",
   // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-  // "image": "mcr.microsoft.com/devcontainers/python:3.9-bookworm",
   // "image": "mcr.microsoft.com/devcontainers/python:3.10-bookworm",
   // "image": "mcr.microsoft.com/devcontainers/python:3.11-bookworm",
   // "image": "mcr.microsoft.com/devcontainers/python:3.12-bookworm",
   // "image": "mcr.microsoft.com/devcontainers/python:1-3.12-bullseye",
   // "image": "mcr.microsoft.com/devcontainers/python:3.13-bookworm",
-  "image": "mcr.microsoft.com/devcontainers/python:3.13-bullseye",
+  "image": "mcr.microsoft.com/devcontainers/python:3.14-bookworm",
 
   "features": {
     "ghcr.io/hspaans/devcontainer-features/pytest:1": {},
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index eac65d13..276d1830 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       max-parallel: 5
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - uses: actions/checkout@v6
diff --git a/README.md b/README.md
index adf23ac6..4f06a982 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ The Microsoft Graph Core Python Client Library contains core classes used by [Mi
 
 ## Prerequisites
 
-    Python 3.9+
+    Python 3.10+
 
 This library doesn't support [older](https://devguide.python.org/versions/) versions of Python.
 
diff --git a/pyproject.toml b/pyproject.toml
index 843aa3db..c636be4b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,18 +16,18 @@ dependencies = [
     "microsoft-kiota-http >=1.8.0,<2.0.0",
     "httpx[http2] >=0.23.0",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = "MIT"
 license-files = ["LICENSE"]
 readme = "README.md"
 keywords = ["msgraph", "openAPI", "Microsoft", "Graph"]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
-    "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",
+    "Programming Language :: Python :: 3.14",
 ]
 
 [project.optional-dependencies]