diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 4c3762d..d22b722 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.6', '2.7', '3.0', '3.2']
+        ruby-version: ['3.0', '3.1', '3.2', '3.3']
     steps:
     - uses: actions/checkout@v4
     - name: Set up Ruby
diff --git a/.rubocop.yml b/.rubocop.yml
index da7eef1..41544f0 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,32 +1,20 @@
-inherit_from: []
-
-inherit_gem:
-  standard: config/base.yml
-
 require:
   - standard
+  - standard-custom
+  - standard-performance
   - rubocop-performance
 
+inherit_gem:
+  standard: config/base.yml
+  standard-custom: config/base.yml
+  standard-performance: config/base.yml
+
 AllCops:
+  TargetRubyVersion: 3.0
+  NewCops: enable
   SuggestExtensions: false
   Exclude:
     - 'node_modules/**/*'
     - 'tmp/**/*'
     - 'vendor/**/*'
     - '.git/**/*'
-
-Style/TrailingCommaInArguments:
-  Enabled: true
-  EnforcedStyleForMultiline: consistent_comma
-
-Style/TrailingCommaInArrayLiteral:
-  Enabled: true
-  EnforcedStyleForMultiline: consistent_comma
-
-Style/TrailingCommaInHashLiteral:
-  Enabled: true
-  EnforcedStyleForMultiline: consistent_comma
-
-Style/Alias:
-  Enabled: true
-  EnforcedStyle: prefer_alias_method
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6cbbfde..fba9a66 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## Unreleased
 
+* Change: update Faraday to 2.x, released about two years ago. The public API of this gem doesn't change, therefore this is not a major release. However, if you manipulate directly faraday's objects, you may encounter breaking changes. Refer to [Faraday's website](https://lostisland.github.io/faraday/) for how to migrate.
+
 ## 3.4.0 - 2023-01-26
 
 * New: Add `databases#upgrade` endpoint for database API ([#51](https://github.com/Scalingo/scalingo-ruby-api/pull/51))
diff --git a/lib/scalingo/api/client.rb b/lib/scalingo/api/client.rb
index 1b406cc..0d4d929 100644
--- a/lib/scalingo/api/client.rb
+++ b/lib/scalingo/api/client.rb
@@ -29,11 +29,11 @@ def self.register_handlers!(handlers)
 
       def self.register_handler!(method_name, klass)
         define_method(method_name) do
-          value = instance_variable_get("@#{method_name}")
+          value = instance_variable_get(:"@#{method_name}")
 
           if value.nil?
             value = klass.new(self)
-            instance_variable_set("@#{method_name}", value)
+            instance_variable_set(:"@#{method_name}", value)
           end
 
           value
@@ -54,7 +54,7 @@ def inspect
       def headers
         hash = {
           "User-Agent" => config.user_agent,
-          "Accept" => "application/json",
+          "Accept" => "application/json"
         }
 
         if (extra = config.additional_headers).present?
@@ -67,7 +67,7 @@ def headers
       def connection_options
         {
           url: url,
-          headers: headers,
+          headers: headers
         }
       end
 
@@ -106,11 +106,7 @@ def authenticated_connection
         @connection = Faraday.new(connection_options) { |conn|
           conn.response :json, content_type: /\bjson$/, parser_options: {symbolize_names: true}
           conn.request :json
-
-          if token_holder.token&.value
-            auth_header = Faraday::Request::Authorization.header "Bearer", token_holder.token.value
-            conn.headers[Faraday::Request::Authorization::KEY] = auth_header
-          end
+          conn.request :authorization, "Bearer", -> { token_holder.token&.value }
 
           conn.adapter(config.faraday_adapter) if config.faraday_adapter
         }
@@ -123,12 +119,7 @@ def database_connection(database_id)
         @database_connections[database_id] ||= Faraday.new(connection_options) { |conn|
           conn.response :json, content_type: /\bjson$/, parser_options: {symbolize_names: true}
           conn.request :json
-
-          bearer_token = token_holder.database_tokens[database_id]&.value
-          if bearer_token
-            auth_header = Faraday::Request::Authorization.header "Bearer", bearer_token
-            conn.headers[Faraday::Request::Authorization::KEY] = auth_header
-          end
+          conn.request :authorization, "Bearer", -> { token_holder.database_tokens[database_id]&.value }
 
           conn.adapter(config.faraday_adapter) if config.faraday_adapter
         }
diff --git a/lib/scalingo/api/response.rb b/lib/scalingo/api/response.rb
index 4f9cae4..f145663 100644
--- a/lib/scalingo/api/response.rb
+++ b/lib/scalingo/api/response.rb
@@ -1,8 +1,8 @@
 module Scalingo
   module API
     class Response
-      def self.unpack(client, key: nil, keys: nil, &block)
-        response = block.call
+      def self.unpack(client, key: nil, keys: nil)
+        response = yield
 
         body = response.body
         has_hash_body = body.present? && body.respond_to?(:key)
@@ -24,7 +24,7 @@ def self.unpack(client, key: nil, keys: nil, &block)
           headers: response.headers,
           data: data,
           meta: meta,
-          full_body: body,
+          full_body: body
         )
       end
 
diff --git a/lib/scalingo/auth.rb b/lib/scalingo/auth.rb
index 5bda9f1..c8ee2bc 100644
--- a/lib/scalingo/auth.rb
+++ b/lib/scalingo/auth.rb
@@ -13,7 +13,7 @@ class Auth < API::Client
       scm_integrations: ScmIntegrations,
       tokens: Tokens,
       two_factor_auth: TwoFactorAuth,
-      user: User,
+      user: User
     )
 
     alias_method :tfa, :two_factor_auth
diff --git a/lib/scalingo/auth/tokens.rb b/lib/scalingo/auth/tokens.rb
index cbd1e43..6d1167f 100644
--- a/lib/scalingo/auth/tokens.rb
+++ b/lib/scalingo/auth/tokens.rb
@@ -5,10 +5,10 @@ class Auth::Tokens < API::Endpoint
     def exchange(token, headers = nil, &block)
       data = nil
 
-      authorization = Faraday::Request::BasicAuthentication.header("", token)
+      authorization = Faraday::Utils.basic_header_from("", token)
 
       request_headers = {
-        Faraday::Request::Authorization::KEY => authorization,
+        Faraday::Request::Authorization::KEY => authorization
       }
 
       request_headers.update(headers) if headers
diff --git a/lib/scalingo/billing.rb b/lib/scalingo/billing.rb
index 5b0e3c8..fa65bb2 100644
--- a/lib/scalingo/billing.rb
+++ b/lib/scalingo/billing.rb
@@ -5,7 +5,7 @@ class Billing < API::Client
     require "scalingo/billing/profile"
 
     register_handlers!(
-      profile: Profile,
+      profile: Profile
     )
   end
 end
diff --git a/lib/scalingo/client.rb b/lib/scalingo/client.rb
index 0c97402..8bd5cc1 100644
--- a/lib/scalingo/client.rb
+++ b/lib/scalingo/client.rb
@@ -10,21 +10,21 @@ class Client < CoreClient
     def auth
       @auth ||= Auth.new(
         "https://auth.scalingo.com/v1",
-        scalingo: self,
+        scalingo: self
       )
     end
 
     def billing
       @billing ||= Billing.new(
         "https://cashmachine.scalingo.com",
-        scalingo: self,
+        scalingo: self
       )
     end
 
     def osc_fr1
       @osc_fr1 ||= Regional.new(
         "https://api.osc-fr1.scalingo.com/v1",
-        scalingo: self,
+        scalingo: self
       )
     end
     alias_method :apps_api_osc_fr1, :osc_fr1
@@ -32,7 +32,7 @@ def osc_fr1
     def osc_secnum_fr1
       @osc_secnum_fr1 ||= Regional.new(
         "https://api.osc-secnum-fr1.scalingo.com/v1",
-        scalingo: self,
+        scalingo: self
       )
     end
     alias_method :apps_api_osc_secnum_fr1, :osc_secnum_fr1
@@ -40,14 +40,14 @@ def osc_secnum_fr1
     def db_api_osc_fr1
       @db_api_osc_fr1 ||= RegionalDatabase.new(
         "https://db-api.osc-fr1.scalingo.com/api",
-        scalingo: self,
+        scalingo: self
       )
     end
 
     def db_api_osc_secnum_fr1
       @db_api_osc_secnum_fr1 ||= RegionalDatabase.new(
         "https://db-api.osc-secnum-fr1.scalingo.com/api",
-        scalingo: self,
+        scalingo: self
       )
     end
   end
diff --git a/lib/scalingo/configuration.rb b/lib/scalingo/configuration.rb
index 5330990..d748d69 100644
--- a/lib/scalingo/configuration.rb
+++ b/lib/scalingo/configuration.rb
@@ -37,7 +37,7 @@ class Configuration
       :additional_headers,
 
       # Specify an adapter for faraday. Leave nil for the default one (Net::HTTP)
-      :faraday_adapter,
+      :faraday_adapter
     ]
 
     ATTRIBUTES.each { |attr| attr_accessor(attr) }
@@ -49,13 +49,13 @@ def self.default
         exchanged_token_validity: 1.hour,
         raise_on_missing_authentication: true,
         raise_on_expired_token: false,
-        additional_headers: {},
+        additional_headers: {}
       )
     end
 
     def initialize(attributes = {}, parent = nil)
       ATTRIBUTES.each do |name|
-        public_send("#{name}=", attributes.fetch(name, parent&.public_send(name)))
+        public_send(:"#{name}=", attributes.fetch(name, parent&.public_send(name)))
       end
     end
   end
diff --git a/lib/scalingo/core_client.rb b/lib/scalingo/core_client.rb
index 108de5f..21c655c 100644
--- a/lib/scalingo/core_client.rb
+++ b/lib/scalingo/core_client.rb
@@ -1,6 +1,5 @@
 require "forwardable"
 require "faraday"
-require "faraday_middleware"
 require "scalingo/token_holder"
 require "scalingo/errors"
 
@@ -67,7 +66,7 @@ def authenticate_with(access_token: nil, bearer_token: nil, expires_at: nil)
           self.token = BearerToken.new(
             response.data[:token],
             expires_at: expiration,
-            raise_on_expired: config.raise_on_expired_token,
+            raise_on_expired: config.raise_on_expired_token
           )
         end
 
@@ -78,7 +77,7 @@ def authenticate_with(access_token: nil, bearer_token: nil, expires_at: nil)
         authenticate_with_bearer_token(
           bearer_token,
           expires_at: expires_at,
-          raise_on_expired_token: config.raise_on_expired_token,
+          raise_on_expired_token: config.raise_on_expired_token
         )
 
         true
diff --git a/lib/scalingo/regional.rb b/lib/scalingo/regional.rb
index 051ab77..4692081 100644
--- a/lib/scalingo/regional.rb
+++ b/lib/scalingo/regional.rb
@@ -31,7 +31,7 @@ class Regional < API::Client
       metrics: Metrics,
       notifiers: Notifiers,
       operations: Operations,
-      scm_repo_links: ScmRepoLinks,
+      scm_repo_links: ScmRepoLinks
     )
   end
 end
diff --git a/lib/scalingo/regional/addons.rb b/lib/scalingo/regional/addons.rb
index e6a0b52..ac9967d 100644
--- a/lib/scalingo/regional/addons.rb
+++ b/lib/scalingo/regional/addons.rb
@@ -89,7 +89,7 @@ def authenticate!(app_id, addon_id, headers = nil, &block)
         addon_id,
         token,
         expires_at: Time.now + 1.hour,
-        raise_on_expired_token: client.config.raise_on_expired_token,
+        raise_on_expired_token: client.config.raise_on_expired_token
       )
 
       response
diff --git a/lib/scalingo/regional_database.rb b/lib/scalingo/regional_database.rb
index b7887d7..20fe7e6 100644
--- a/lib/scalingo/regional_database.rb
+++ b/lib/scalingo/regional_database.rb
@@ -7,7 +7,7 @@ class RegionalDatabase < API::Client
 
     register_handlers!(
       databases: Databases,
-      backups: Backups,
+      backups: Backups
     )
   end
 end
diff --git a/lib/scalingo/token_holder.rb b/lib/scalingo/token_holder.rb
index db60938..b3d8cf7 100644
--- a/lib/scalingo/token_holder.rb
+++ b/lib/scalingo/token_holder.rb
@@ -55,7 +55,7 @@ def build_bearer_token(bearer_token, expires_at:, raise_on_expired_token:)
       BearerToken.new(
         token,
         expires_at: expires_at,
-        raise_on_expired: raise_on_expired_token,
+        raise_on_expired: raise_on_expired_token
       )
     end
   end
diff --git a/scalingo.gemspec b/scalingo.gemspec
index 83a647f..e2fbfbd 100644
--- a/scalingo.gemspec
+++ b/scalingo.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
     "changelog_uri" => "https://github.com/Scalingo/scalingo-ruby-api/blob/master/CHANGELOG.md",
     "documentation_uri" => "https://developers.scalingo.com/",
     "homepage_uri" => "https://www.scalingo.com/",
-    "source_code_uri" => "https://github.com/Scalingo/scalingo-ruby-api",
+    "source_code_uri" => "https://github.com/Scalingo/scalingo-ruby-api"
   }
 
   # Specify which files should be added to the gem when it is released.
@@ -32,18 +32,15 @@ Gem::Specification.new do |s|
   s.executables = s.files.grep(%r{^exe/}) { |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.test_files = Dir["spec/**/*_spec.rb"]
-
   s.add_dependency "activesupport", [">= 5", "< 8"]
-  s.add_dependency "faraday", "~> 1.0"
-  s.add_dependency "faraday_middleware", "~> 1.0"
+  s.add_dependency "faraday", "~> 2.0"
   s.add_dependency "multi_json", ">= 1.0.3", "~> 1.0"
 
   s.add_development_dependency "bundler", "~> 2.0"
   s.add_development_dependency "rake", "~> 13.0"
   s.add_development_dependency "rspec", "~> 3.0"
-  s.add_development_dependency "standard", "~> 1.1.0"
+  s.add_development_dependency "standard", "~> 1.32"
   s.add_development_dependency "rubocop-rspec"
   s.add_development_dependency "pry", "~> 0.14.1"
-  s.add_development_dependency "webmock", "~> 3.12.2"
+  s.add_development_dependency "webmock", "~> 3.19"
 end
diff --git a/spec/scalingo/api/client_spec.rb b/spec/scalingo/api/client_spec.rb
index cd2d8c5..62a6512 100644
--- a/spec/scalingo/api/client_spec.rb
+++ b/spec/scalingo/api/client_spec.rb
@@ -164,8 +164,13 @@
     end
 
     context "with bearer token" do
+      before { stub_request(:any, "localhost") }
+
       it "has an authentication header set with a bearer scheme" do
-        expect(subject.connection.headers["Authorization"]).to eq "Bearer #{subject.token_holder.token.value}"
+        request_headers = subject.connection.get("/").env.request_headers
+        expected = "Bearer #{subject.token_holder.token.value}"
+
+        expect(request_headers["Authorization"]).to eq(expected)
       end
     end
   end
@@ -184,14 +189,20 @@
     end
 
     context "with bearer token" do
+      before { stub_request(:any, "localhost") }
+
       it "has an authentication header set with a bearer scheme" do
         scalingo.authenticate_database_with_bearer_token(
           database_id,
           "1234",
           expires_at: Time.now + 1.hour,
-          raise_on_expired_token: false,
+          raise_on_expired_token: false
         )
-        expect(subject.database_connection(database_id).headers["Authorization"]).to eq "Bearer #{subject.token_holder.database_tokens[database_id].value}"
+
+        request_headers = subject.database_connection(database_id).get("/").env.request_headers
+        expected = "Bearer #{subject.token_holder.database_tokens[database_id].value}"
+
+        expect(request_headers["Authorization"]).to eq(expected)
       end
     end
 
@@ -202,7 +213,7 @@
           database_id_2,
           "1234",
           expires_at: Time.now + 1.hour,
-          raise_on_expired_token: false,
+          raise_on_expired_token: false
         )
         expect {
           subject.database_connection(database_id)
diff --git a/spec/scalingo/api/response_spec.rb b/spec/scalingo/api/response_spec.rb
index e208b18..3a6318f 100644
--- a/spec/scalingo/api/response_spec.rb
+++ b/spec/scalingo/api/response_spec.rb
@@ -15,7 +15,7 @@
       headers: headers,
       data: data,
       full_body: full_body,
-      meta: meta_object,
+      meta: meta_object
     )
   }
 
@@ -28,7 +28,7 @@
         body: body,
         status: status,
         headers: headers,
-        success?: success,
+        success?: success
       )
     }
 
diff --git a/spec/scalingo/client_spec.rb b/spec/scalingo/client_spec.rb
index 8169e89..7ae6d31 100644
--- a/spec/scalingo/client_spec.rb
+++ b/spec/scalingo/client_spec.rb
@@ -52,7 +52,7 @@
       it "is successful with valid token" do
         fake_response = OpenStruct.new(
           successful?: true,
-          data: {token: "response token"},
+          data: {token: "response token"}
         )
 
         expect(subject.auth.tokens).to receive(:exchange).and_return(fake_response)
@@ -64,7 +64,7 @@
 
       it "fails with invalid token" do
         fake_response = OpenStruct.new(
-          successful?: false,
+          successful?: false
         )
 
         expect(subject.auth.tokens).to receive(:exchange).and_return(fake_response)
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 6c74adc..e1a4edc 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,5 +1,6 @@
 require "bundler/setup"
 require "scalingo"
+require "active_support/all"
 
 pattern = File.join(File.expand_path(__dir__), "support", "**", "*.rb")
 
diff --git a/spec/support/scalingo.rb b/spec/support/scalingo.rb
index 45ec449..e8aa5dc 100644
--- a/spec/support/scalingo.rb
+++ b/spec/support/scalingo.rb
@@ -6,7 +6,7 @@ module Scalingo
     auth: "https://auth.scalingo.test",
     billing: "https://billing.scalingo.test",
     regional: "https://regional.scalingo.test",
-    regional_database: "https://regional-database.scalingo.test",
+    regional_database: "https://regional-database.scalingo.test"
   }
 
   class SpecClient < CoreClient
@@ -59,8 +59,7 @@ def register_stubs!(pattern = "**/*", api: nil, folder: nil)
         url = stub_data[:url] || File.join(endpoint, stub_data[:path])
         method = (stub_data[:method] || :get).to_sym
 
-        request_options = {
-        }
+        request_options = {}
 
         if stub_data[:request].present?
           req = stub_data[:request]
@@ -79,7 +78,7 @@ def register_stubs!(pattern = "**/*", api: nil, folder: nil)
 
         response_options = {
           status: stub_data.dig(:response, :status) || 200,
-          headers: {},
+          headers: {}
         }
 
         if stub_data.dig(:response, :json_body).present?
@@ -142,7 +141,7 @@ module Common
       if described_class < Scalingo::API::Endpoint
         api = described_class.to_s.split("::")[-2].downcase
 
-        described_class.new(send("#{api}_guest"))
+        described_class.new(send(:"#{api}_guest"))
       end
     end