diff --git a/.gitignore b/.gitignore
index f1f4956..fc29803 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ test-app/log
 test-app/pids
 test-app/procodile.log
 global.yml
+*.gem
diff --git a/README.md b/README.md
index a290ed1..740ac90 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,20 @@
 # Procodile 🐊
 
+> **This is DeployHQ's maintained fork of [adamcooke/procodile](https://github.com/adamcooke/procodile).**
+>
+> Upstream has had no release since 1.0.26 (November 2019) and no commit since February 2021. Its `master` carries a version bump to 1.0.27 and a bug fix that were never published to RubyGems, and open pull requests have gone unanswered for years.
+>
+> We depend on Procodile to run DeployHQ in production, so we maintain it. All credit for the original work goes to Adam Cooke; this fork stays MIT licensed.
+>
+> **The gem is published as [`dhq-procodile`](https://rubygems.org/gems/dhq-procodile)**, because we do not own the `procodile` name on RubyGems. It still installs an executable called `procodile`, so no Procfile, script, or Capistrano config needs to change:
+>
+> ```
+> gem install dhq-procodile
+> procodile --version
+> ```
+>
+> Upstream pull requests are left open as a courtesy, but this fork is where changes land.
+
 Running & deploying Ruby apps to places like [Viaduct](https://viaduct.io) & Heroku is really easy but running processes on actual servers is less fun. Procodile aims to take some the stress out of running your Ruby/Rails apps and give you some of the useful process management features you get from the takes of the PaaS providers.
 
 Procodile is a bit like [Foreman](https://github.com/ddollar/foreman) but things are designed to run in the background (as well as the foreground if you prefer) and there's a supervisor which keeps an eye on your processes and will respawn them if they die.
@@ -8,7 +23,7 @@ Procodile works out of the box with your existing `Procfile`.
 
 * [Watch a quick screencast](https://vimeo.com/188041935)
 * [Read documentation](https://github.com/adamcooke/procodile/wiki)
-* [View on RubyGems](https://rubygems.org/gems/procodile)
-* [Check the CHANGELOG](https://github.com/adamcooke/procodile/blob/master/CHANGELOG.md)
+* [View on RubyGems](https://rubygems.org/gems/dhq-procodile)
+* [Check the CHANGELOG](https://github.com/adamcooke/procodile/blob/master/CHANGELOG.md) (upstream)
 
 ![Screenshot](https://share.adam.ac/16/cAZRKUM7.png)
diff --git a/dhq-procodile.gemspec b/dhq-procodile.gemspec
new file mode 100644
index 0000000..f312ebb
--- /dev/null
+++ b/dhq-procodile.gemspec
@@ -0,0 +1,26 @@
+require_relative './lib/procodile/version'
+Gem::Specification.new do |s|
+  s.name          = "dhq-procodile"
+  s.description   = %q{A sophisticated process manager for applications running on Linux & macOS. This is DeployHQ's maintained fork of Adam Cooke's procodile, which has had no release since 2019.}
+  s.summary       = %q{This gem will help you run processes from a Procfile on Linux/macOS machines in the background or the foreground. DeployHQ's maintained fork of procodile.}
+  s.homepage      = "https://github.com/deployhq/procodile"
+  s.version       = Procodile::VERSION
+  s.files         = Dir.glob("{lib,bin}/**/*") + ['MIT-LICENCE', 'README.md']
+  s.require_paths = ["lib"]
+  s.authors       = ["Adam Cooke", "DeployHQ"]
+  s.email         = ["support@deployhq.com"]
+  s.licenses      = ['MIT']
+  # Matches the Ruby versions exercised by .github/workflows/tests.yml
+  s.required_ruby_version = '>= 2.7'
+  s.metadata      = {
+    'source_code_uri' => 'https://github.com/deployhq/procodile',
+    'bug_tracker_uri' => 'https://github.com/deployhq/procodile/issues'
+  }
+  s.bindir = "bin"
+  s.executables << 'procodile'
+  s.add_runtime_dependency 'json'
+  # `logger` is still a default gem on Ruby 3.x but is being removed from the
+  # default set in Ruby 4.0, which already warns on require. lib/procodile/logger.rb
+  # requires it, so declare it rather than relying on it being present.
+  s.add_runtime_dependency 'logger'
+end
diff --git a/procodile.gemspec b/procodile.gemspec
deleted file mode 100644
index af06847..0000000
--- a/procodile.gemspec
+++ /dev/null
@@ -1,18 +0,0 @@
-require_relative './lib/procodile/version'
-Gem::Specification.new do |s|
-  s.name          = "procodile"
-  s.description   = %q{A sophisticated process manager for applications running on Linux & macOS.}
-  s.summary       = %q{This gem will help you run processes from a Procfile on Linux/macOS machines in the background or the foreground.}
-  s.homepage      = "https://github.com/adamcooke/procodile"
-  s.version       = Procodile::VERSION
-  s.files         = Dir.glob("{lib,bin}/**/*")
-  s.require_paths = ["lib"]
-  s.authors       = ["Adam Cooke"]
-  s.email         = ["me@adamcooke.io"]
-  s.licenses      = ['MIT']
-  s.cert_chain    = ['certs/adamcooke.pem']
-  s.signing_key   = File.expand_path("~/.gem/signing-key.pem") if $0 =~ /gem\z/
-  s.bindir = "bin"
-  s.executables << 'procodile'
-  s.add_runtime_dependency 'json'
-end