diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7fb9e4b..0ff25a2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,11 +8,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: [2.4, 2.5, 2.6, 2.7, '3.0', 3.1]
+        ruby-version: [2.4, 2.5, 2.6, 2.7, '3.0', 3.1, 3.2, 3.3]
 
     name: Specs - Ruby ${{ matrix.ruby-version }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Install libcurl
       run: |
         sudo apt-get update
diff --git a/Gemfile b/Gemfile
index d0f13e0..550a6eb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,3 +2,13 @@ source 'https://rubygems.org'
 
 # Specify your gem's dependencies in patron.gemspec
 gemspec
+
+gem "rake", ">= 12.3.3"
+gem "rspec", ">= 2.3.0"
+gem "simplecov", "~> 0.10"
+gem "yard", "~> 0.9.20"
+rack_version = RUBY_VERSION >= "3.3" ? "~> 2.2" : "~> 2.1.4"
+gem "rack", rack_version
+gem "puma", '~> 3.11'
+gem "rake-compiler"
+gem "webrick", "~> 1.8"
diff --git a/patron.gemspec b/patron.gemspec
index 0c4fb5e..0a8366b 100644
--- a/patron.gemspec
+++ b/patron.gemspec
@@ -35,12 +35,4 @@ SecureTransport-based builds might cause crashes in forking environment.
 
 For more info see https://github.com/curl/curl/issues/788
 }
-  spec.add_development_dependency "rake", ">= 12.3.3"
-  spec.add_development_dependency "bundler"
-  spec.add_development_dependency "rspec", ">= 2.3.0"
-  spec.add_development_dependency "simplecov", "~> 0.10"
-  spec.add_development_dependency "yard", "~> 0.9.20"
-  spec.add_development_dependency "rack", "~> 2.1.4"
-  spec.add_development_dependency "puma", '~> 3.11'
-  spec.add_development_dependency "rake-compiler"
 end