diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 266855f8..2b28b2a6 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.0', '3.1', '3.2']
+        ruby-version: ['3.2', '3.3']
 
     steps:
     - uses: actions/checkout@v2
diff --git a/Gemfile b/Gemfile
index 32bd2f0b..3662e836 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,7 @@ source 'https://rubygems.org'
 gemspec
 
 group :test do
-  gem 'rubocop', '~> 1.23.0', require: false
+  gem 'rubocop', '~> 1.86', require: false
+  gem 'parallel', '1.26.3'
   gem 'awesome_print', require: 'ap'
 end
diff --git a/fhir_client.gemspec b/fhir_client.gemspec
index 0656f1c9..6f44f79c 100644
--- a/fhir_client.gemspec
+++ b/fhir_client.gemspec
@@ -23,13 +23,13 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 3.0.0'
   spec.add_dependency 'activesupport', '>= 3'
-  spec.add_dependency 'addressable', '>= 2.3'
-  spec.add_dependency 'fhir_models', '>= 5.0.0'
+  spec.add_dependency 'addressable', '>= 2.9.0'
+  spec.add_dependency 'fhir_models', '>= 5.1.0'
   spec.add_dependency 'fhir_stu3_models', '>= 3.1.1'
   spec.add_dependency 'fhir_dstu2_models', '>= 1.1.1'
-  spec.add_dependency 'nokogiri', '>= 1.10.4'
+  spec.add_dependency 'nokogiri', '>= 1.19.1'
   spec.add_dependency 'oauth2', '~> 2.0'
-  spec.add_dependency 'rack', '>= 1.5'
+  spec.add_dependency 'rack', '>= 2.2.23'
   spec.add_dependency 'rest-client', '~> 2.0'
   spec.add_dependency 'tilt', '>= 1.1'