diff --git a/docker/django b/docker/django
index 7d1cec7..1dbfcee 100644
--- a/docker/django
+++ b/docker/django
@@ -1,5 +1,5 @@
 # stage 1
-FROM python:3.11-bookworm as backend
+FROM python:3.9-bullseye as backend
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         vim \
@@ -17,7 +17,7 @@ RUN pip install -r requirements/production.txt
 
 
 # stage 2
-FROM node:current-bookworm AS frontend-build
+FROM node:current-bullseye AS frontend-build
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         git \
@@ -36,7 +36,7 @@ RUN npm run build
 
 
 # stage 3
-FROM python:3.11-bookworm as production
+FROM python:3.9-bullseye as production
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         postgresql-client \
@@ -80,7 +80,7 @@ RUN python src/manage.py collectstatic --noinput \
 
 
 # (optional) stage 4
-FROM python:3.11-bookworm as development
+FROM python:3.9-bullseye as development
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         vim \
diff --git a/docker/webpack b/docker/webpack
index 368100d..17ea2bc 100644
--- a/docker/webpack
+++ b/docker/webpack
@@ -1,4 +1,4 @@
-FROM node:12-bullseye
+FROM node:16-bullseye
 
 WORKDIR /app
 RUN mkdir /app/src
diff --git a/gitlab-ci/build.yml b/gitlab-ci/build.yml
index 0811a59..856e938 100644
--- a/gitlab-ci/build.yml
+++ b/gitlab-ci/build.yml
@@ -1,6 +1,6 @@
 static:
   stage: build
-  image: node:16-bookworm
+  image: node:16-bullseye
   before_script:
     - npm install
   script:
diff --git a/gitlab-ci/lint.yml b/gitlab-ci/lint.yml
index f4f1abe..6169c51 100644
--- a/gitlab-ci/lint.yml
+++ b/gitlab-ci/lint.yml
@@ -1,6 +1,6 @@
 python-linting:
   stage: lint
-  image: python:3.11-bookworm
+  image: python:3.9-bullseye
   before_script:
     - pip install -r requirements/ci.txt
   script:
@@ -14,7 +14,7 @@ python-linting:
 
 javascript-linting:
   stage: lint
-  image: node:16-bookworm
+  image: node:16-bullseye
   before_script:
     - npm install
   script:
diff --git a/gitlab-ci/test.yml b/gitlab-ci/test.yml
index 1597952..e614268 100644
--- a/gitlab-ci/test.yml
+++ b/gitlab-ci/test.yml
@@ -4,7 +4,7 @@ python-tests:
   services:
     - postgres:15
     - memcached:1.5.22
-  image: python:3.11-bookworm
+  image: python:3.9-bullseye
   before_script:
     - pip install -r requirements/ci.txt
   script:
@@ -12,7 +12,7 @@ python-tests:
 
 javascript-tests:
   stage: test
-  image: node:16-bookworm
+  image: node:16-bullseye
   before_script:
     - npm install
   script: