diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bafe5fa..c5cbe32 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: ['2.6', '2.7', '3.0']
+        ruby: ['2.6', '2.7', '3.0', '3.1']
 
     steps:
       - uses: actions/checkout@v1
diff --git a/Gemfile b/Gemfile
index c9d9afa..5998ba2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,12 +1,11 @@
 # frozen_string_literal: true
 
 source "https://rubygems.org"
+
 gemspec
 
 gem "rake", "~> 13.0"
 gem "rspec", "~> 3.0"
 gem "simplecov", "~> 0.19.0"
 gem "standardrb", "~> 1.0"
-
-gem "multipart-parser", "~> 0.1.1"
 gem "webmock", "~> 3.4"
diff --git a/faraday-net_http_persistent.gemspec b/faraday-net_http_persistent.gemspec
index 7e7cb84..d14adae 100644
--- a/faraday-net_http_persistent.gemspec
+++ b/faraday-net_http_persistent.gemspec
@@ -13,7 +13,7 @@ Gem::Specification.new do |spec|
   spec.homepage = "https://github.com/lostisland/faraday-net_http_persistent"
   spec.license = "MIT"
 
-  spec.required_ruby_version = Gem::Requirement.new(">= 2.5.0")
+  spec.required_ruby_version = Gem::Requirement.new(">= 2.6.0")
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "https://github.com/lostisland/faraday-net_http_persistent"
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
   spec.files = Dir.glob("lib/**/*") + %w[README.md LICENSE.md]
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "faraday", ">= 2.0.0.alpha.pre.2"
-  spec.add_dependency "faraday-net_http"
+  spec.add_dependency "faraday", "~> 2.0"
+  spec.add_dependency "faraday-net_http", "~> 2.0"
   spec.add_dependency "net-http-persistent", "~> 4.0"
 end
diff --git a/lib/faraday/adapter/net_http_persistent.rb b/lib/faraday/adapter/net_http_persistent.rb
index df2969b..3e1b9ad 100644
--- a/lib/faraday/adapter/net_http_persistent.rb
+++ b/lib/faraday/adapter/net_http_persistent.rb
@@ -14,18 +14,14 @@ def net_http_connection(env)
           if Net::HTTP::Persistent.instance_method(:initialize)
               .parameters.first == %i[key name]
             options = {name: "Faraday"}
-            if @connection_options.key?(:pool_size)
-              options[:pool_size] = @connection_options[:pool_size]
-            end
+            options[:pool_size] = @connection_options[:pool_size] if @connection_options.key?(:pool_size)
             Net::HTTP::Persistent.new(**options)
           else
             Net::HTTP::Persistent.new("Faraday")
           end
 
         proxy_uri = proxy_uri(env)
-        if @cached_connection.proxy_uri != proxy_uri
-          @cached_connection.proxy = proxy_uri
-        end
+        @cached_connection.proxy = proxy_uri if @cached_connection.proxy_uri != proxy_uri
         @cached_connection
       end
 
@@ -76,9 +72,7 @@ def perform_request(http, env)
       rescue Net::HTTP::Persistent::Error => e
         raise Faraday::TimeoutError, e if e.message.include? "Timeout"
 
-        if e.message.include? "connection refused"
-          raise Faraday::ConnectionFailed, e
-        end
+        raise Faraday::ConnectionFailed, e if e.message.include? "connection refused"
 
         raise
       end
diff --git a/lib/faraday/net_http_persistent/version.rb b/lib/faraday/net_http_persistent/version.rb
index c87ea2c..9a5a0c4 100644
--- a/lib/faraday/net_http_persistent/version.rb
+++ b/lib/faraday/net_http_persistent/version.rb
@@ -2,6 +2,6 @@
 
 module Faraday
   module NetHttpPersistent
-    VERSION = "1.2.0"
+    VERSION = "2.0.0"
   end
 end