diff --git a/.ruby-version b/.ruby-version
index a04abec9..818bd47a 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.6.10
+3.0.6
diff --git a/Gemfile b/Gemfile
index fd22480d..5380a8f3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,8 +1,11 @@
 source 'http://rubygems.org'
-ruby '2.6.10'
+ruby '3.0.6'
 
 gem 'rails', '= 6.1.7.4'
 
+# The HTTP server running the Rails instance.
+gem 'webrick', '~> 1.7'
+
 # Our database is MySQL, in both development and production.
 gem 'mysql2', '~> 0.5.5'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 5cf0c811..94d33e26 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -301,6 +301,7 @@ GEM
       activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
       railties (>= 6.0.0)
+    webrick (1.8.1)
     websocket-driver (0.7.6)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -341,10 +342,11 @@ DEPENDENCIES
   sass-rails (~> 5.0, >= 5.0.7)
   uglifier (~> 4.2)
   web-console (~> 4.2)
+  webrick (~> 1.7)
   will_paginate (~> 4.0)
 
 RUBY VERSION
-   ruby 2.6.10p210
+   ruby 3.0.6p216
 
 BUNDLED WITH
    2.4.18
diff --git a/Vagrantfile b/Vagrantfile
index 20311112..40ed691d 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -75,7 +75,7 @@ Vagrant.configure("2") do |config|
     apt-get install -y libmysqlclient-dev libcurl4-openssl-dev nodejs
     su vagrant -c 'git clone https://github.com/rbenv/rbenv.git ~/.rbenv'
     su vagrant -c 'git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build'
-    su vagrant -c '~/.rbenv/bin/rbenv install 2.6.10 && ~/.rbenv/shims/gem update --system'
+    su vagrant -c '~/.rbenv/bin/rbenv install 3.0.6 && ~/.rbenv/shims/gem update --system'
     apt-get install -y mysql-server
     mysql -e "CREATE USER IF NOT EXISTS openneo_impress IDENTIFIED BY 'openneo_impress';"
     mysql -e "CREATE DATABASE IF NOT EXISTS openneo_impress;"
diff --git a/vendor/cache/webrick-1.8.1.gem b/vendor/cache/webrick-1.8.1.gem
new file mode 100644
index 00000000..ac0894b9
Binary files /dev/null and b/vendor/cache/webrick-1.8.1.gem differ