diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 37ca4ffef..220224313 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -45,17 +45,17 @@ repos:
     rev: v0.7.0
     hooks:
       - id: ruff-format
-        args: [--target-version, py311] # 3.11
+        args: [--target-version, py312] # 3.12
   # - repo: https://github.com/dosisod/refurb
   #   rev: v2.0.0
   #   hooks:
   #     - id: refurb
-  #       args: [--python-version, "3.11", --sort, error]  #, --format, gitub
+  #       args: [--python-version, "3.12", --sort, error]  #, --format, gitub
   - repo: https://github.com/asottile/pyupgrade
     rev: v3.17.0
     hooks:
       - id: pyupgrade
-        args: [--py311-plus] # 3.11
+        args: [--py312-plus] # 3.12
   - repo: https://github.com/adamchainz/django-upgrade
     rev: 1.21.0
     hooks:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index df75100bf..02bf1b8bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 ??.??.??
 ========
 
-- Reintroduced CI jobs for Python 3.12, and we have also added support for Python 3.13.
+- We're now running on Python 3.12 (its CI jobs were reintroduced), and we have also added support for Python 3.13.
 - We have switched over to `uv` everywhere (Makefile, Docker, CI) instead of plain `pip-tools`.
 - Replaced `isort` and `black` with `ruff` (CI).
 - Added history tracking to the `Duty` model.
@@ -15,7 +15,7 @@
 ========
 
 - E-mail communications: grayed-out "send" button after 1 click, to avoid spamming inboxes.
-- Fixtures: save_initial_data management cmd will use built-in json formatter instead of `jq`.
+- Fixtures: `save_initial_data` management command will now be using the built-in json formatter instead of `jq`.
 - Updated clipboard functionality at Incoming submodule.
 - Updated organisms names on both production database and fixtures.
 - Updated dependencies.
diff --git a/backend.Dockerfile b/backend.Dockerfile
index 28b9890e0..bb80d25c8 100644
--- a/backend.Dockerfile
+++ b/backend.Dockerfile
@@ -1,6 +1,6 @@
-ARG PyVersion=3.11  # to be repeated after FROM, docker syntax is at fault.
+ARG PyVersion=3.12  # to be repeated after FROM, docker syntax is at fault.
 FROM python:${PyVersion}-bullseye AS pk2_base
-ARG PyVersion=3.11
+ARG PyVersion=3.12
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /bin/uv
 
 ENV \
@@ -27,6 +27,9 @@ RUN localedef -i en_US -f UTF-8 en_US.UTF-8
 
 WORKDIR /usr/src/app
 
+## Pre-heat the cache
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv pip install setuptools wheel psycopg2 gunicorn django~=4.2
 ## First, bring dependencies specification and install them
 COPY ./backend/requirements requirements
 RUN --mount=type=cache,target=/root/.cache/uv \