diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8472cd2a..9ac2c4d8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
       - name: Create Cache Hash
diff --git a/HISTORY.rst b/HISTORY.rst
index 6413e561..2c57bb86 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -4,6 +4,7 @@ History
 
 X.Y.Z (YYYY-MM-DD)
 ------------------
+* Deprecate Python 3.9 support (:pr:`338`)
 * Update minio server version (:pr:`338`)
 * Remove complicated push setup in github action workflow (:pr:`338`)
 * Fix date typo in HISTORY.rst (:pr:`336`)
diff --git a/daskms/conftest.py b/daskms/conftest.py
index e14e0014..6d4833a3 100644
--- a/daskms/conftest.py
+++ b/daskms/conftest.py
@@ -297,8 +297,8 @@ def minio_server(tmp_path_factory):
     server_process = Popen(args, env=env, shell=False, stdout=PIPE, stderr=PIPE)
 
     try:
-        while line := server_process.stdout.readline():
-            if "Documentation: ".encode("utf-8") in line:
+        while line := server_process.stderr.readline():
+            if "Docs: ".encode("utf-8") in line:
                 break
 
         retcode = server_process.poll()
diff --git a/pyproject.toml b/pyproject.toml
index 6000a89e..68a0bf83 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ readme = "README.rst"
 packages = [{include = "daskms"}]
 
 [tool.poetry.dependencies]
-python = "^3.9, < 3.13"
+python = "^3.10, < 3.13"
 appdirs = "^1.4.4"
 dask = {extras = ["array"], version = ">= 2023.1.1"}
 donfig = ">= 0.8.0"