diff --git a/.ruby-version b/.ruby-version
index be94e6f5..15a27998 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.2.2
+3.3.0
diff --git a/Dockerfile b/Dockerfile
index f85c550f..5675cfa1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG ruby_version=3.2.2
+ARG ruby_version=3.3
 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.lock b/Gemfile.lock
index 5d8ac7cd..1836e0b4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -153,9 +153,6 @@ GEM
     globalid (1.2.1)
       activesupport (>= 6.1)
     google-protobuf (3.25.2)
-    google-protobuf (3.25.2-aarch64-linux)
-    google-protobuf (3.25.2-arm64-darwin)
-    google-protobuf (3.25.2-x86_64-linux)
     googleapis-common-protos-types (1.11.0)
       google-protobuf (~> 3.18)
     govuk_app_config (9.9.1)