diff --git a/.buildkite/Dockerfile b/.buildkite/Dockerfile
index 7b0eb2e8e..a68ad997d 100644
--- a/.buildkite/Dockerfile
+++ b/.buildkite/Dockerfile
@@ -1,4 +1,4 @@
-ARG PYTHON_VERSION=3.12
+ARG PYTHON_VERSION=3.13
 FROM python:${PYTHON_VERSION}
 
 # Default UID/GID to 1000
diff --git a/.buildkite/pipeline.yml b/.buildkite/pipeline.yml
index 16bf81360..46e5a7675 100644
--- a/.buildkite/pipeline.yml
+++ b/.buildkite/pipeline.yml
@@ -16,6 +16,7 @@ steps:
           - "3.10"
           - "3.11"
           - "3.12"
+          - "3.13"
         connection:
           - "urllib3"
           - "requests"
@@ -27,7 +28,7 @@ steps:
             connection: "urllib3"
             nox_session: "test_otel"
         - with:
-            python: "3.12"
+            python: "3.13"
             connection: "urllib3"
             nox_session: "test_otel"
     command: ./.buildkite/run-tests
diff --git a/.buildkite/run-tests b/.buildkite/run-tests
index ff8b0a89f..f46376a4d 100755
--- a/.buildkite/run-tests
+++ b/.buildkite/run-tests
@@ -7,7 +7,7 @@
 # Default environment variables
 export STACK_VERSION="${STACK_VERSION:=8.16.0-SNAPSHOT}"
 export TEST_SUITE="${TEST_SUITE:=platinum}"
-export PYTHON_VERSION="${PYTHON_VERSION:=3.12}"
+export PYTHON_VERSION="${PYTHON_VERSION:=3.13}"
 export PYTHON_CONNECTION_CLASS="${PYTHON_CONNECTION_CLASS:=urllib3}"
 
 script_path=$(dirname $(realpath $0))
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 94c554900..1d7b8ecfd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
         nox-session: [""]
         runs-on: ["ubuntu-latest"]
 
diff --git a/.readthedocs.yml b/.readthedocs.yml
index eee10c078..ccbd86512 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -7,7 +7,7 @@ build:
     # to set AIOHTTP_NO_EXTENSIONS to 1 but it has to be done in
     # https://readthedocs.org/dashboard/elasticsearch-py/environmentvariables/
     # because of https://github.com/readthedocs/readthedocs.org/issues/6311
-    python: "3.12"
+    python: "3"
 
 python:
   install:
diff --git a/noxfile.py b/noxfile.py
index 2f9bc3322..b42ed0d2f 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -45,14 +45,14 @@ def pytest_argv():
     ]
 
 
-@nox.session(python=["3.8", "3.9", "3.10", "3.11", "3.12"])
+@nox.session(python=["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"])
 def test(session):
     session.install(".[dev]", env=INSTALL_ENV, silent=False)
 
     session.run(*pytest_argv(), *session.posargs)
 
 
-@nox.session(python=["3.8", "3.12"])
+@nox.session(python=["3.8", "3.13"])
 def test_otel(session):
     session.install(
         ".[dev]",
diff --git a/pyproject.toml b/pyproject.toml
index 1a2563680..f7a1c575e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,6 +26,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
 ]