diff --git a/api/Dockerfile b/api/Dockerfile
index a0961566f..56b45456a 100644
--- a/api/Dockerfile
+++ b/api/Dockerfile
@@ -1,6 +1,6 @@
 # WARNING: Update taskcluster/docker/k8s-image/Dockerfile file when you update
 # this one. Or better, find a way to use the same Dockerfile
-FROM python:3.9
+FROM python:3.12
 
 RUN groupadd --gid 10001 app && \
     useradd -g app --uid 10001 --shell /usr/sbin/nologin --create-home --home-dir /app app
diff --git a/api/Dockerfile.public b/api/Dockerfile.public
index 9c1e7db60..2a67afdfe 100644
--- a/api/Dockerfile.public
+++ b/api/Dockerfile.public
@@ -1,6 +1,6 @@
 # WARNING: Update taskcluster/docker/k8s-image/Dockerfile file when you update
 # this one. Or better, find a way to use the same Dockerfile
-FROM python:3.9
+FROM python:3.12
 
 RUN groupadd --gid 10001 app && \
     useradd -g app --uid 10001 --shell /usr/sbin/nologin --create-home --home-dir /app app
diff --git a/api/tox.ini b/api/tox.ini
index 86e486df3..95f297dc0 100644
--- a/api/tox.ini
+++ b/api/tox.ini
@@ -7,8 +7,8 @@ passenv =
     PYTHON_VERSION
     TOXENV
 setenv =
-    PYTHON_VERSION=3.9.18
-    TOXENV=check,py39
+    PYTHON_VERSION=3.12.8
+    TOXENV=check,py312
 deps =
 usedevelop = false
 depends =
@@ -46,7 +46,7 @@ passenv = COVERAGE_REPORT_COMMAND
 commands =
     poetry install --only test
     poetry run {env:COVERAGE_REPORT_COMMAND:coverage report}
-depends = py39
+depends = py312
 parallel_show_output = true
 
 [testenv:check]
diff --git a/taskcluster/kinds/docker-image/kind.yml b/taskcluster/kinds/docker-image/kind.yml
index 5c1af9699..3ec50319c 100644
--- a/taskcluster/kinds/docker-image/kind.yml
+++ b/taskcluster/kinds/docker-image/kind.yml
@@ -11,10 +11,10 @@ transforms:
     - taskgraph.transforms.task:transforms
 
 tasks:
-    python39:
+    python312:
         definition: python
         args:
-            PYTHON_VERSION: "3.9.13"
+            PYTHON_VERSION: "3.12.8"
     node14:
         definition: node
         args:
diff --git a/taskcluster/kinds/k8s-image/kind.yml b/taskcluster/kinds/k8s-image/kind.yml
index 01d689fe2..d60d0386a 100644
--- a/taskcluster/kinds/k8s-image/kind.yml
+++ b/taskcluster/kinds/k8s-image/kind.yml
@@ -15,7 +15,7 @@ tasks:
     shipit-admin:
         definition: shipit
         args:
-            PYTHON_VERSION: "3.9"
+            PYTHON_VERSION: "3.12"
             APP_TYPE: admin
             # Use plain text "<self>" instead of using {"task-reference":
             # "<self>"}, because the docker_image transform expects args to be
@@ -25,7 +25,7 @@ tasks:
     shipit-public:
         definition: shipit
         args:
-            PYTHON_VERSION: "3.9"
+            PYTHON_VERSION: "3.12"
             APP_TYPE: public
             # Use plain text "<self>" instead of using {"task-reference":
             # "<self>"}, because the docker_image transform expects args to be
diff --git a/taskcluster/kinds/tests/kind.yml b/taskcluster/kinds/tests/kind.yml
index ea5197605..c67730bbb 100644
--- a/taskcluster/kinds/tests/kind.yml
+++ b/taskcluster/kinds/tests/kind.yml
@@ -28,7 +28,7 @@ tasks:
     api-python:
         description: "{name} tox-py{substitute_version}"
         substitute-versions:
-            - 39
+            - 312
         attributes:
             artifact_prefix: public
         worker:
@@ -45,7 +45,7 @@ tasks:
             command:
                 - sh
                 - -lxce
-                  # --no-ansi is needed due to https://github.com/python-oetry/poetry/issues/7148
+                  # --no-ansi is needed due to https://github.com/python-poetry/poetry/issues/7148
                 - >-
                   cd api && poetry install --only tox --no-root --no-ansi && poetry run tox --parallel -e clean,check,py{substitute_version},report
     frontend-node: