diff --git a/.ci/azure-pipelines.yml b/.ci/azure-pipelines.yml
index 7e84e779..94919e35 100644
--- a/.ci/azure-pipelines.yml
+++ b/.ci/azure-pipelines.yml
@@ -34,15 +34,15 @@ jobs:
 
       Loc_27_210:
         tox.env: py27-mode_localhost-ansible2.10
-      Loc_312_8:
+      Loc_312_9:
         python.version: '3.12'
-        tox.env: py312-mode_localhost-ansible8
+        tox.env: py312-mode_localhost-ansible9
 
       Van_27_210:
         tox.env: py27-mode_localhost-ansible2.10-strategy_linear
-      Van_312_8:
+      Van_312_9:
         python.version: '3.12'
-        tox.env: py312-mode_localhost-ansible8-strategy_linear
+        tox.env: py312-mode_localhost-ansible9-strategy_linear
 
 - job: Linux
   pool:
@@ -160,3 +160,6 @@ jobs:
       Ans_312_8:
         python.version: '3.12'
         tox.env: py312-mode_ansible-ansible8
+      Ans_312_9:
+        python.version: '3.12'
+        tox.env: py312-mode_ansible-ansible9
diff --git a/ansible_mitogen/loaders.py b/ansible_mitogen/loaders.py
index 11015430..9729b8a1 100644
--- a/ansible_mitogen/loaders.py
+++ b/ansible_mitogen/loaders.py
@@ -49,7 +49,7 @@ __all__ = [
 
 
 ANSIBLE_VERSION_MIN = (2, 10)
-ANSIBLE_VERSION_MAX = (2, 15)
+ANSIBLE_VERSION_MAX = (2, 16)
 
 NEW_VERSION_MSG = (
     "Your Ansible version (%s) is too recent. The most recent version\n"
diff --git a/docs/ansible_detailed.rst b/docs/ansible_detailed.rst
index 1f6ac9a6..b395bc25 100644
--- a/docs/ansible_detailed.rst
+++ b/docs/ansible_detailed.rst
@@ -165,6 +165,8 @@ Noteworthy Differences
   +-----------------+-----------------+
   | 8               | 3.9 - 3.12      |
   +-----------------+-----------------+
+  | 9               | 3.10 - 3.12     |
+  +-----------------+-----------------+
 
   Verify your installation is running one of these versions by checking
   ``ansible --version`` output.
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 8e979a1a..88d78f96 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -23,6 +23,7 @@ Unreleased
 
 * :gh:issue:`1021` Support for Ansible 8 (ansible-core 2.15)
 * tests: Replace uses of ``include:`` & ``import:``, unsupported in Ansible 9
+* :gh:issue:`1053` Support for Ansible 9 (ansible-core 2.16)
 
 
 v0.3.6 (2024-04-04)
diff --git a/tox.ini b/tox.ini
index 435d5e65..69639233 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,7 +11,7 @@
 # 2.5                        <= 3.7.1   <= 1.4.22             <= 1.3.1   <= 2.1.3   <= 2.8.7   <= 1.6.1   <= 1.9.1
 # 2.6  <= 2.6.20  <= 2.12    <= 4.5.4   <= 1.6.11  <= 2.10.3  <= 9.0.3   <= 5.9.0   <= 3.2.5   <= 2.9.1   <= 15.2.0
 # 2.7  <= 2.11               <= 5.5     <= 1.11.29 <= 2.11.3  <= 20                 <= 4.6.11  <= 3.28    <= 20.15²
-# 3.5  <= 2.11    <= 2.13    <= 5.5     <= 2.2.28  <= 2.11.3  <= 20      <= 5.9.5   <= 6.1.0   <= 3.28    <= 20.15²
+# 3.5  <= 2.11    <= 2.15    <= 5.5     <= 2.2.28  <= 2.11.3  <= 20      <= 5.9.5   <= 6.1.0   <= 3.28    <= 20.15²
 # 3.6  <= 2.11               <= 6.2     <= 3.2.20  <= 3.0.3   <= 21                 <= 7.0.1   <= 3.28    <= 20.17²
 # 3.7  <= 2.12               <= 7.2.7   <= 3.2.20                                   <= 7.4.4   <= 4.8.0
 # 3.8  <= 2.12
@@ -57,7 +57,7 @@ envlist =
     init,
     py{27,36}-mode_ansible-ansible{2.10,3,4},
     py{311}-mode_ansible-ansible{2.10,3,4,5},
-    py{312}-mode_ansible-ansible{6,7,8},
+    py{312}-mode_ansible-ansible{6,7,8,9},
     py{27,36,312}-mode_mitogen-distro_centos{6,7,8},
     py{27,36,312}-mode_mitogen-distro_debian{9,10,11},
     py{27,36,312}-mode_mitogen-distro_ubuntu{1604,1804,2004},
@@ -85,6 +85,7 @@ deps =
     ansible6: ansible~=6.0
     ansible7: ansible~=7.0
     ansible8: ansible~=8.0
+    ansible9: ansible~=9.0
 install_command =
     python -m pip --no-python-version-warning --disable-pip-version-check install {opts} {packages}
 commands_pre =
@@ -120,10 +121,12 @@ setenv =
     distro_ubuntu1804: DISTRO=ubuntu1804
     distro_ubuntu2004: DISTRO=ubuntu2004
     # Note the plural, only applicable to MODE=ansible
-    # Ansible >= 6 (ansible-core >= 2.13) require Python 2.7 or >= 3.5 on targets
+    # Ansible 6 - 8 (ansible-core 2.13 - 2.15) require Python 2.7 or >= 3.5 on targets
     ansible6: DISTROS=centos7 centos8 debian9 debian10 debian11 ubuntu1604 ubuntu1804 ubuntu2004
     ansible7: DISTROS=centos7 centos8 debian9 debian10 debian11 ubuntu1604 ubuntu1804 ubuntu2004
     ansible8: DISTROS=centos7 centos8 debian9 debian10 debian11 ubuntu1604 ubuntu1804 ubuntu2004
+    # Ansible >= 9 (ansible-core >= 2.16) require Python 2.7 or >= 3.6 on targets
+    ansible9: DISTROS=centos7 centos8 debian9 debian10 debian11 ubuntu1804 ubuntu2004
     distros_centos: DISTROS=centos6 centos7 centos8
     distros_centos5: DISTROS=centos5
     distros_centos6: DISTROS=centos6