diff --git a/COPYRIGHT b/COPYRIGHT
index 8b560079..36daa5b0 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -1,4 +1,4 @@
-Copyright 2013-2021 Thibaut Courouble and other contributors
+Copyright 2013-2022 Thibaut Courouble and other contributors
 
   This Source Code Form is subject to the terms of the Mozilla Public
   License, v. 2.0. If a copy of the MPL was not distributed with this
diff --git a/Dockerfile b/Dockerfile
index 060193df..4079b747 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,4 @@
-FROM ruby:2.7.6
-
+FROM ruby:3.1.2
 ENV LANG=C.UTF-8
 ENV ENABLE_SERVICE_WORKER=true
 
diff --git a/Dockerfile-alpine b/Dockerfile-alpine
index dcd296a2..6575e2d7 100644
--- a/Dockerfile-alpine
+++ b/Dockerfile-alpine
@@ -1,4 +1,4 @@
-FROM ruby:2.7.6-alpine
+FROM ruby:3.1.2-alpine
 
 ENV LANG=C.UTF-8
 ENV ENABLE_SERVICE_WORKER=true
diff --git a/docs/maintainers.md b/docs/maintainers.md
index 24436b73..cd85fc08 100644
--- a/docs/maintainers.md
+++ b/docs/maintainers.md
@@ -32,6 +32,7 @@ In order to deploy DevDocs, you must:
 - be given access to DevDocs's [Sentry instance](https://sentry.io/devdocs/devdocs-js/) (for JS error tracking) and familiarize yourself with its UI.
 
 - be provided with DevDocs's S3 credentials, and install (`brew install awscli` on macOS) and [configure](https://docs.aws.amazon.com/cli/latest/reference/configure/) the AWS CLI on your computer. The configuration must add a named profile called "devdocs":
+
   ```
   aws configure --profile devdocs
   ```