diff --git a/.prettierignore b/.prettierignore
index 171c38c038..c8bd1e3912 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -16,7 +16,6 @@
 .prettierignore
 .rladr
 .rspec
-.ruby-version
 .tool-versions
 Dockerfile
 LICENCE
diff --git a/.ruby-version b/.ruby-version
deleted file mode 100644
index be94e6f53d..0000000000
--- a/.ruby-version
+++ /dev/null
@@ -1 +0,0 @@
-3.2.2
diff --git a/.tool-versions b/.tool-versions
index 9d159e28ae..c2e3e4032a 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -2,6 +2,6 @@ azure-cli 2.51.0
 kubectl 1.27.3
 nodejs 18.1.0
 postgres 14.9
-ruby 3.2.2
+ruby 3.3.0
 terraform 1.5.0
 yarn 1.22.19
diff --git a/Dockerfile b/Dockerfile
index 04b7d3e63a..c2abc4f241 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@
 # production: runs the actual app
 
 # Build builder image
-FROM ruby:3.2.2-alpine as builder
+FROM ruby:3.3.0-alpine as builder
 
 WORKDIR /app
 
@@ -23,7 +23,7 @@ RUN apk upgrade --no-cache openssl libssl3 libcrypto3 curl
 RUN apk add --update --no-cache build-base yarn postgresql14-dev git vips-dev
 
 # Install gems defined in Gemfile
-COPY .ruby-version Gemfile Gemfile.lock ./
+COPY Gemfile Gemfile.lock ./
 
 # Install gems and remove gem cache
 RUN bundler -v && \
@@ -60,7 +60,7 @@ RUN rm -rf node_modules log/* tmp/* /tmp && \
     find /usr/local/bundle/gems -name "*.html" -delete
 
 # Build runtime image
-FROM ruby:3.2.2-alpine as production
+FROM ruby:3.3.0-alpine as production
 
 # The application runs from /app
 WORKDIR /app
diff --git a/Gemfile b/Gemfile
index 4c095beb1d..06d66accb5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby "3.2.2"
+ruby "3.3.0"
 
 gem "rails", "7.1.2"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 494252e8b4..bfda413cfc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,6 +27,7 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
+    abbrev (0.1.2)
     actioncable (7.1.2)
       actionpack (= 7.1.2)
       activesupport (= 7.1.2)
@@ -139,7 +140,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    cgi (0.3.6)
+    cgi (0.4.1)
     climate_control (1.2.0)
     concurrent-ruby (1.2.2)
     connection_pool (2.4.1)
@@ -265,11 +266,11 @@ GEM
     govuk_markdown (2.0.1)
       activesupport
       redcarpet
-    haml (6.2.3)
+    haml (6.3.0)
       temple (>= 0.8.2)
       thor
       tilt
-    hashdiff (1.0.1)
+    hashdiff (1.1.0)
     hashie (5.0.0)
     html-attributes-utils (1.0.2)
       activesupport (>= 6.1.4.4)
@@ -306,6 +307,7 @@ GEM
     matrix (0.4.2)
     method_source (1.0.0)
     mini_mime (1.1.5)
+    mini_portile2 (2.8.5)
     minitest (5.20.0)
     msgpack (1.7.2)
     multi_json (1.15.0)
@@ -340,7 +342,7 @@ GEM
       snaky_hash (~> 2.0)
       version_gem (~> 1.1)
     okcomputer (1.18.5)
-    omniauth (2.1.1)
+    omniauth (2.1.2)
       hashie (>= 3.4.6)
       rack (>= 2.2.3)
       rack-protection
@@ -422,7 +424,8 @@ GEM
       zeitwerk (~> 2.6)
     rainbow (3.1.1)
     rake (13.1.0)
-    rbs (3.2.2)
+    rbs (3.4.1)
+      abbrev
     rdoc (6.6.2)
       psych (>= 4.0.0)
     redcarpet (3.6.0)
@@ -508,7 +511,7 @@ GEM
       concurrent-ruby (~> 1.0, >= 1.0.2)
     shoulda-matchers (6.0.0)
       activesupport (>= 5.2.0)
-    sidekiq (6.5.11)
+    sidekiq (6.5.12)
       connection_pool (>= 2.2.5, < 3)
       rack (~> 2.0)
       redis (>= 4.5.0, < 5)
@@ -555,7 +558,7 @@ GEM
     uber (0.1.0)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.8.2)
+    unf_ext (0.0.9.1)
     unicode-display_width (2.5.0)
     validate_url (1.0.15)
       activemodel (>= 3.0.0)
@@ -587,6 +590,7 @@ GEM
 PLATFORMS
   arm64-darwin-21
   arm64-darwin-22
+  arm64-darwin-23
   x86_64-darwin-21
   x86_64-darwin-22
   x86_64-linux
@@ -652,7 +656,7 @@ DEPENDENCIES
   webmock
 
 RUBY VERSION
-   ruby 3.2.2p53
+   ruby 3.3.0p0
 
 BUNDLED WITH
    2.4.10