diff --git a/.ruby-version b/.ruby-version
index ef538c281..be94e6f53 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.1.2
+3.2.2
diff --git a/Dockerfile b/Dockerfile
index df6bc8f72..c5bf4345d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG ruby_version=3.1.2
+ARG ruby_version=3.2
 ARG base_image=ghcr.io/alphagov/govuk-ruby-base:$ruby_version
 ARG builder_image=ghcr.io/alphagov/govuk-ruby-builder:$ruby_version
 
diff --git a/Gemfile b/Gemfile
index 0a61b2a3d..e5b5d517c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,7 @@
 source "https://rubygems.org"
 
+ruby "~> 3.2.0"
+
 gem "rails", "7.0.7.2"
 
 gem "bootsnap", require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 7037533b4..e38b41519 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -655,5 +655,8 @@ DEPENDENCIES
   uglifier
   webmock
 
+RUBY VERSION
+   ruby 3.2.2p53
+
 BUNDLED WITH
    2.3.22