diff --git a/.editorconfig b/.editorconfig
index 538ba2b..a6e7d26 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -3,3 +3,7 @@ root = true
 [*]
 indent_style = tab
 indent_size = 2
+
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
diff --git a/.github/workflows/coverage.yaml b/.github/workflows/coverage.yaml
index 81f3c65..68adbf2 100644
--- a/.github/workflows/coverage.yaml
+++ b/.github/workflows/coverage.yaml
@@ -21,10 +21,10 @@ jobs:
           - macos
         
         ruby:
-          - "3.2"
+          - "3.3"
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{matrix.ruby}}
@@ -34,7 +34,7 @@ jobs:
       timeout-minutes: 5
       run: bundle exec bake test
 
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: coverage-${{matrix.os}}-${{matrix.ruby}}
         path: .covered.db
@@ -44,10 +44,10 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: "3.2"
+        ruby-version: "3.3"
         bundler-cache: true
     
     - uses: actions/download-artifact@v3
diff --git a/.github/workflows/documentation.yaml b/.github/workflows/documentation.yaml
index 3d483fc..8dc5227 100644
--- a/.github/workflows/documentation.yaml
+++ b/.github/workflows/documentation.yaml
@@ -5,9 +5,6 @@ on:
     branches:
       - main
 
-    # Allows you to run this workflow manually from the Actions tab:
-    workflow_dispatch:
-
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages:
 permissions:
   contents: read
@@ -28,11 +25,11 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: "3.2"
+        ruby-version: "3.3"
         bundler-cache: true
     
     - name: Installing packages
@@ -43,7 +40,7 @@ jobs:
       run: bundle exec bake utopia:project:static --force no
     
     - name: Upload documentation artifact
-      uses: actions/upload-pages-artifact@v1
+      uses: actions/upload-pages-artifact@v2
       with:
         path: docs
   
@@ -58,4 +55,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v1
+        uses: actions/deploy-pages@v3
diff --git a/.github/workflows/test-external.yaml b/.github/workflows/test-external.yaml
index 214149c..21898f5 100644
--- a/.github/workflows/test-external.yaml
+++ b/.github/workflows/test-external.yaml
@@ -20,13 +20,12 @@ jobs:
           - macos
         
         ruby:
-          - "2.7"
-          - "3.0"
           - "3.1"
           - "3.2"
+          - "3.3"
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{matrix.ruby}}
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 5c765b6..0769a98 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -21,10 +21,9 @@ jobs:
           - macos
         
         ruby:
-          - "2.7"
-          - "3.0"
           - "3.1"
           - "3.2"
+          - "3.3"
         
         experimental: [false]
         
@@ -40,7 +39,7 @@ jobs:
             experimental: true
     
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{matrix.ruby}}
diff --git a/async-pool.gemspec b/async-pool.gemspec
index aee746d..93fc1a0 100644
--- a/async-pool.gemspec
+++ b/async-pool.gemspec
@@ -7,7 +7,7 @@ Gem::Specification.new do |spec|
 	spec.version = Async::Pool::VERSION
 	
 	spec.summary = "A singleplex and multiplex resource pool for implementing robust clients."
-	spec.authors = ["Samuel Williams", "Olle Jonsson", "Simon Perepelitsa"]
+	spec.authors = ["Samuel Williams", "Olle Jonsson", "Simon Perepelitsa", "Thomas Morgan"]
 	spec.license = "MIT"
 	
 	spec.cert_chain  = ['release.cert']
@@ -16,19 +16,14 @@ Gem::Specification.new do |spec|
 	spec.homepage = "https://github.com/socketry/async-pool"
 	
 	spec.metadata = {
+		"documentation_uri" => "https://socketry.github.io/async-pool/",
 		"funding_uri" => "https://github.com/sponsors/ioquatix/",
+		"source_code_uri" => "https://github.com/socketry/async-pool.git",
 	}
 	
 	spec.files = Dir.glob(['{lib}/**/*', '*.md'], File::FNM_DOTMATCH, base: __dir__)
 	
-	spec.required_ruby_version = ">= 2.5"
+	spec.required_ruby_version = ">= 3.1"
 	
 	spec.add_dependency "async", ">= 1.25"
-	
-	spec.add_development_dependency "bake-test"
-	spec.add_development_dependency "bake-test-external"
-	spec.add_development_dependency "bundler"
-	spec.add_development_dependency "covered"
-	spec.add_development_dependency "sus", "~> 0.15"
-	spec.add_development_dependency "sus-fixtures-async"
 end
diff --git a/gems.rb b/gems.rb
index 4cf5551..efd876f 100644
--- a/gems.rb
+++ b/gems.rb
@@ -14,3 +14,12 @@
 	gem "utopia-project"
 	gem "bake-github-pages"
 end
+
+group :test do
+	gem "sus", "~> 0.15"
+	gem "sus-fixtures-async"
+	gem "covered"
+	
+	gem "bake-test"
+	gem "bake-test-external"
+end
diff --git a/readme.md b/readme.md
index c50bba9..179fa10 100644
--- a/readme.md
+++ b/readme.md
@@ -52,3 +52,11 @@ We welcome contributions to this project.
 3.  Commit your changes (`git commit -am 'Add some feature'`).
 4.  Push to the branch (`git push origin my-new-feature`).
 5.  Create new Pull Request.
+
+### Developer Certificate of Origin
+
+This project uses the [Developer Certificate of Origin](https://developercertificate.org/). All contributors to this project must agree to this document to have their contributions accepted.
+
+### Contributor Covenant
+
+This project is governed by the [Contributor Covenant](https://www.contributor-covenant.org/). All contributors and participants agree to abide by its terms.