diff --git a/.github/workflows/next-rails.yml b/.github/workflows/next-rails.yml
index 43f03260..6c24660d 100644
--- a/.github/workflows/next-rails.yml
+++ b/.github/workflows/next-rails.yml
@@ -26,7 +26,7 @@ jobs:
           echo "BUNDLE_CACHE_PATH=vendor/cache.next" >> $GITHUB_ENV
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.1.4
+          ruby-version: 3.3.2
           bundler-cache: true
       - name: Prepare spec
         run: |
diff --git a/.github/workflows/spec.yml b/.github/workflows/spec.yml
index 7da756c6..008374f3 100644
--- a/.github/workflows/spec.yml
+++ b/.github/workflows/spec.yml
@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.1.4
+          ruby-version: 3.3.2
           bundler-cache: true
       - run: bundle exec rubocop
       - run: bundle exec haml-lint app/views
@@ -34,7 +34,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.1.4
+          ruby-version: 3.3.2
           bundler-cache: true
       - name: Prepare spec
         run: |
diff --git a/.ruby-version b/.ruby-version
index 0aec50e6..47725433 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.1.4
+3.3.2
diff --git a/Dockerfile b/Dockerfile
index bd87877c..2e9edc1e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,6 +17,10 @@ USER osem
 WORKDIR /osem/
 
 # Install our bundle
-RUN bundle install --jobs=3 --retry=3
+RUN bundle config set --local path 'vendor/bundle'; \
+    bundle install --jobs=4 --retry=3
+
+# Install our process manager
+RUN gem install foreman
 
 CMD ["foreman", "start"]
diff --git a/Gemfile b/Gemfile
index 05e824ac..d9c836b3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ end
 
 source 'https://rubygems.org'
 
-ruby ENV.fetch('OSEM_RUBY_VERSION', '3.1.4')
+ruby '3.3.2'
 
 # as web framework
 if next?
diff --git a/Gemfile.lock b/Gemfile.lock
index 9c172fb4..01e5a9e9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -717,7 +717,7 @@ DEPENDENCIES
   whenever
 
 RUBY VERSION
-   ruby 3.1.4
+   ruby 3.3.2
 
 BUNDLED WITH
-   2.3.26
+   2.5.9
diff --git a/dotenv.example b/dotenv.example
index 372800ec..b6ca7a36 100644
--- a/dotenv.example
+++ b/dotenv.example
@@ -32,9 +32,6 @@
 # OSEM_MEMCACHED_USERNAME='root'
 # OSEM_MEMCACHED_PASSWORD='1234'
 
-# Set this if you want to deviate from our 'standard' ruby version
-# OSEM_RUBY_VERSION=3.1.2
-
 # What time is it?
 # OSEM_TIME_ZONE="UTC"