diff --git a/AGENTS.md b/AGENTS.md
index 5135dc981..255e5dbf7 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1,5 +1,5 @@
 # Project Overview
-- Rails 7.1 monolith for the Raspberry Pi Code Editor API (REST + GraphQL), served at `editor-api.raspberrypi.org`.
+- Rails 8.1 monolith for the Raspberry Pi Code Editor API (REST + GraphQL), served at `editor-api.raspberrypi.org`.
 - Primary runtime via Docker; API listens on port 3009.
 
 ## Architecture
diff --git a/Gemfile b/Gemfile
index 3c64ae8e1..9e57e8efc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -41,7 +41,7 @@ gem 'propshaft'
 gem 'puma', '~> 8.0'
 gem 'rack_content_type_default', '~> 1.1'
 gem 'rack-cors'
-gem 'rails', '~> 8.0.5'
+gem 'rails', '~> 8.1.3'
 gem 'ruby-progressbar', '~> 1.13', require: false
 gem 'sentry-rails'
 gem 'statesman'
diff --git a/Gemfile.lock b/Gemfile.lock
index 53b857221..f062fd634 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,29 +11,31 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (8.0.5)
-      actionpack (= 8.0.5)
-      activesupport (= 8.0.5)
+    action_text-trix (2.1.19)
+      railties
+    actioncable (8.1.3)
+      actionpack (= 8.1.3)
+      activesupport (= 8.1.3)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
       zeitwerk (~> 2.6)
-    actionmailbox (8.0.5)
-      actionpack (= 8.0.5)
-      activejob (= 8.0.5)
-      activerecord (= 8.0.5)
-      activestorage (= 8.0.5)
-      activesupport (= 8.0.5)
+    actionmailbox (8.1.3)
+      actionpack (= 8.1.3)
+      activejob (= 8.1.3)
+      activerecord (= 8.1.3)
+      activestorage (= 8.1.3)
+      activesupport (= 8.1.3)
       mail (>= 2.8.0)
-    actionmailer (8.0.5)
-      actionpack (= 8.0.5)
-      actionview (= 8.0.5)
-      activejob (= 8.0.5)
-      activesupport (= 8.0.5)
+    actionmailer (8.1.3)
+      actionpack (= 8.1.3)
+      actionview (= 8.1.3)
+      activejob (= 8.1.3)
+      activesupport (= 8.1.3)
       mail (>= 2.8.0)
       rails-dom-testing (~> 2.2)
-    actionpack (8.0.5)
-      actionview (= 8.0.5)
-      activesupport (= 8.0.5)
+    actionpack (8.1.3)
+      actionview (= 8.1.3)
+      activesupport (= 8.1.3)
       nokogiri (>= 1.8.5)
       rack (>= 2.2.4)
       rack-session (>= 1.0.1)
@@ -41,42 +43,43 @@ GEM
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
       useragent (~> 0.16)
-    actiontext (8.0.5)
-      actionpack (= 8.0.5)
-      activerecord (= 8.0.5)
-      activestorage (= 8.0.5)
-      activesupport (= 8.0.5)
+    actiontext (8.1.3)
+      action_text-trix (~> 2.1.15)
+      actionpack (= 8.1.3)
+      activerecord (= 8.1.3)
+      activestorage (= 8.1.3)
+      activesupport (= 8.1.3)
       globalid (>= 0.6.0)
       nokogiri (>= 1.8.5)
-    actionview (8.0.5)
-      activesupport (= 8.0.5)
+    actionview (8.1.3)
+      activesupport (= 8.1.3)
       builder (~> 3.1)
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    activejob (8.0.5)
-      activesupport (= 8.0.5)
+    activejob (8.1.3)
+      activesupport (= 8.1.3)
       globalid (>= 0.3.6)
-    activemodel (8.0.5)
-      activesupport (= 8.0.5)
-    activerecord (8.0.5)
-      activemodel (= 8.0.5)
-      activesupport (= 8.0.5)
+    activemodel (8.1.3)
+      activesupport (= 8.1.3)
+    activerecord (8.1.3)
+      activemodel (= 8.1.3)
+      activesupport (= 8.1.3)
       timeout (>= 0.4.0)
-    activestorage (8.0.5)
-      actionpack (= 8.0.5)
-      activejob (= 8.0.5)
-      activerecord (= 8.0.5)
-      activesupport (= 8.0.5)
+    activestorage (8.1.3)
+      actionpack (= 8.1.3)
+      activejob (= 8.1.3)
+      activerecord (= 8.1.3)
+      activesupport (= 8.1.3)
       marcel (~> 1.0)
-    activesupport (8.0.5)
+    activesupport (8.1.3)
       base64
-      benchmark (>= 0.3)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.3.1)
       connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
+      json
       logger (>= 1.4.2)
       minitest (>= 5.1)
       securerandom (>= 0.3)
@@ -114,7 +117,6 @@ GEM
     aws-sigv4 (1.12.1)
       aws-eventstream (~> 1, >= 1.0.2)
     base64 (0.3.0)
-    benchmark (0.5.0)
     bigdecimal (4.1.2)
     bootsnap (1.24.0)
       msgpack (~> 1.2)
@@ -379,20 +381,20 @@ GEM
       rack
     rackup (2.3.1)
       rack (>= 3)
-    rails (8.0.5)
-      actioncable (= 8.0.5)
-      actionmailbox (= 8.0.5)
-      actionmailer (= 8.0.5)
-      actionpack (= 8.0.5)
-      actiontext (= 8.0.5)
-      actionview (= 8.0.5)
-      activejob (= 8.0.5)
-      activemodel (= 8.0.5)
-      activerecord (= 8.0.5)
-      activestorage (= 8.0.5)
-      activesupport (= 8.0.5)
+    rails (8.1.3)
+      actioncable (= 8.1.3)
+      actionmailbox (= 8.1.3)
+      actionmailer (= 8.1.3)
+      actionpack (= 8.1.3)
+      actiontext (= 8.1.3)
+      actionview (= 8.1.3)
+      activejob (= 8.1.3)
+      activemodel (= 8.1.3)
+      activerecord (= 8.1.3)
+      activestorage (= 8.1.3)
+      activesupport (= 8.1.3)
       bundler (>= 1.15.0)
-      railties (= 8.0.5)
+      railties (= 8.1.3)
     rails-dom-testing (2.3.0)
       activesupport (>= 5.0.0)
       minitest
@@ -405,9 +407,9 @@ GEM
     rails-html-sanitizer (1.7.0)
       loofah (~> 2.25)
       nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
-    railties (8.0.5)
-      actionpack (= 8.0.5)
-      activesupport (= 8.0.5)
+    railties (8.1.3)
+      actionpack (= 8.1.3)
+      activesupport (= 8.1.3)
       irb (~> 1.13)
       rackup (>= 1.0.0)
       rake (>= 12.2)
@@ -616,7 +618,7 @@ DEPENDENCIES
   puma (~> 8.0)
   rack-cors
   rack_content_type_default (~> 1.1)
-  rails (~> 8.0.5)
+  rails (~> 8.1.3)
   rails-erd
   rspec
   rspec-rails
diff --git a/config/application.rb b/config/application.rb
index 3a914d3df..53566619a 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -23,7 +23,7 @@
 
 module App
   class Application < Rails::Application
-    config.load_defaults 8.0
+    config.load_defaults 8.1
 
     config.add_autoload_paths_to_load_path = false