diff --git a/.ruby-version b/.ruby-version
index be94e6f53..15a279981 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.2.2
+3.3.0
diff --git a/Dockerfile b/Dockerfile
index a5fc09fc5..a47bc7342 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 a5455c0d1..712a8276f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -227,9 +227,6 @@ GEM
       google-apis-discovery_v1 (~> 0.5)
       thor (>= 0.20, < 2.a)
     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 (1.12.0)
       google-protobuf (~> 3.18)
     googleauth (1.8.1)