diff --git a/.buildkite/Dockerfile b/.buildkite/Dockerfile
index 3c429a37b..7b0eb2e8e 100644
--- a/.buildkite/Dockerfile
+++ b/.buildkite/Dockerfile
@@ -1,4 +1,4 @@
-ARG PYTHON_VERSION=3.8
+ARG PYTHON_VERSION=3.12
 FROM python:${PYTHON_VERSION}
 
 # Default UID/GID to 1000
diff --git a/noxfile.py b/noxfile.py
index a3e1fc172..12ad4f02e 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -73,7 +73,7 @@ def test_otel(session):
 
 @nox.session()
 def format(session):
-    session.install("black~=24.0", "isort", "flynt", "unasync", "setuptools")
+    session.install("black~=24.0", "isort", "flynt", "unasync>=0.6.0")
 
     session.run("python", "utils/run-unasync.py")
     session.run("isort", "--profile=black", *SOURCE_FILES)