diff --git a/.circleci/config.yml b/.circleci/config.yml
index f90f9aa6..33b210a2 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -5,9 +5,9 @@ version: 2.1
 # Define a job to be invoked later in a workflow.
 # See: https://circleci.com/docs/2.0/configuration-reference/#jobs
 jobs:
-  api-tests-3-11:
+  api-tests-3-13:
     docker:
-      - image: cimg/python:3.11
+      - image: cimg/python:3.13
     # `large` (4 vCPU, 8 GB) so pytest-xdist's `-nauto` has room to scale.
     resource_class: large
     steps:
@@ -15,7 +15,7 @@ jobs:
       - run: sudo apt-get update
       - run: sudo apt-get install -y ffmpeg catdoc
       - restore_cache:
-          key: deps-3.11-{{ checksum "requirements.txt" }}-5
+          key: deps-3.13-{{ checksum "requirements.txt" }}-5
       - run:
           name: Install Requirements
           command: |
@@ -23,7 +23,7 @@ jobs:
             . venv/bin/activate
             pip install -r requirements.txt
       - save_cache:
-          key: deps-3.11-{{ checksum "requirements.txt" }}-5
+          key: deps-3.13-{{ checksum "requirements.txt" }}-5
           paths:
             - "venv"
       # `-nauto` parallelizes across all available cores via pytest-xdist.
@@ -35,7 +35,7 @@ jobs:
           path: test-results.xml
   # Do the API and the frontend's test fixtures still agree?
   #
-  # `api-tests-3-11` runs these too, as part of the whole suite.  This job exists for the
+  # `api-tests-3-13` runs these too, as part of the whole suite.  This job exists for the
   # signal: fixture drift is silent by nature -- the frontend suite passes against a body the
   # API stopped sending -- so it is worth a check whose name says what broke, failing in under a
   # minute rather than somewhere inside seventeen hundred results.
@@ -44,12 +44,12 @@ jobs:
   # Python jobs, so it costs a venv restore and one test file.
   api-contract-tests:
     docker:
-      - image: cimg/python:3.11
+      - image: cimg/python:3.13
     resource_class: medium
     steps:
       - checkout
       - restore_cache:
-          key: deps-3.11-{{ checksum "requirements.txt" }}-5
+          key: deps-3.13-{{ checksum "requirements.txt" }}-5
       - run:
           name: Install Requirements
           command: |
@@ -62,12 +62,12 @@ jobs:
 
   api-alembic-migrations:
     docker:
-      - image: cimg/python:3.11
+      - image: cimg/python:3.13
     resource_class: medium
     steps:
       - checkout
       - restore_cache:
-          key: deps-3.11-{{ checksum "requirements.txt" }}-5
+          key: deps-3.13-{{ checksum "requirements.txt" }}-5
       - run:
           name: Install Requirements
           command: |
@@ -83,35 +83,13 @@ jobs:
       - run:
           name: Check for Missing Migrations
           command: MEDIA_DIRECTORY=/tmp/wrolpi-media ./venv/bin/python ./main.py db check
-  api-tests-3-12:
-    docker:
-      - image: cimg/python:3.12
-    resource_class: large
-    steps:
-      - checkout
-      - run: sudo apt-get update
-      - run: sudo apt-get install -y ffmpeg catdoc
-      - restore_cache:
-          key: deps-3.12-{{ checksum "requirements.txt" }}-5
-      - run:
-          name: Install Requirements
-          command: |
-            python3 -m venv venv
-            . venv/bin/activate
-            pip install -r requirements.txt
-      - save_cache:
-          key: deps-3.12-{{ checksum "requirements.txt" }}-5
-          paths:
-            - "venv"
-      - run:
-          command: './venv/bin/pytest -nauto'
   sanic-api-start:
     docker:
-      - image: cimg/python:3.11
+      - image: cimg/python:3.13
     steps:
       - checkout
       - restore_cache:
-          key: deps-3.11-{{ checksum "requirements.txt" }}-5
+          key: deps-3.13-{{ checksum "requirements.txt" }}-5
       - run:
           name: Install dependencies
           command: |
@@ -206,10 +184,9 @@ workflows:
   wrolpi-api-tests:
     jobs:
       - sanic-api-start
-      - api-tests-3-11
+      - api-tests-3-13
       - api-contract-tests
       - api-alembic-migrations
-  #      - api-tests-3-12 Sanic does not yet support 3.12.
   wrolpi-app-test:
     jobs:
       - react-app-start
diff --git a/.github/workflows/controller-tests.yml b/.github/workflows/controller-tests.yml
index d4dfa60d..21739c62 100644
--- a/.github/workflows/controller-tests.yml
+++ b/.github/workflows/controller-tests.yml
@@ -21,7 +21,8 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.11'
+          # Trixie ships 3.13, and docker/controller/Dockerfile is python:3.13-slim-trixie.
+          python-version: '3.13'
           cache: 'pip'
           cache-dependency-path: controller/requirements.txt