diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb175b4..7af6252 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 - __Breaking change!__ Default route is generated using hashed bot token.
   Please reconfigure webhook after update (`rake telegram:bot:set_webhook`).
 - Update to Bot API 5.0, add rake tasks for `deleteWebhook`, `close` & `logOut`.
+- Add `server` option for client to support local bot API servers.
 
 # 0.14.4
 
diff --git a/README.md b/README.md
index f3b8224..d506b98 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,11 @@ which is used for `Telegram.bot`.
 ```ruby
 Telegram.bots_config = {
   default: DEFAULT_BOT_TOKEN,
-  chat: {token: CHAT_BOT_TOKEN, username: 'chatbot'},
+  chat: {
+    token: CHAT_BOT_TOKEN,
+    username: 'ChatBot', # to support commands with mentions (/help@ChatBot)
+    server: 'http://local.bot.api.server', # for Local Bot API Server
+  },
 }
 
 Telegram.bot.get_updates
@@ -87,6 +91,7 @@ development:
     bot:
       token: TOKEN
       username: SomeBot
+      server: http://local.bot.api.server
 
     # For multiple bots in single app use hash of `internal_bot_id => settings`
     bots:
diff --git a/lib/telegram/bot/client.rb b/lib/telegram/bot/client.rb
index beb32ee..fcff19c 100644
--- a/lib/telegram/bot/client.rb
+++ b/lib/telegram/bot/client.rb
@@ -5,7 +5,8 @@ require 'httpclient'
 module Telegram
   module Bot
     class Client
-      URL_TEMPLATE = 'https://api.telegram.org/bot%<token>s/'.freeze
+      SERVER = 'https://api.telegram.org'.freeze
+      URL_TEMPLATE = '%<server>s/bot%<token>s/'.freeze
 
       autoload :TypedResponse, 'telegram/bot/client/typed_response'
       prepend Async
@@ -61,11 +62,11 @@ module Telegram
 
       attr_reader :client, :token, :username, :base_uri
 
-      def initialize(token = nil, username = nil, **options)
+      def initialize(token = nil, username = nil, server: SERVER, **options)
         @client = HTTPClient.new
         @token = token || options[:token]
         @username = username || options[:username]
-        @base_uri = format(URL_TEMPLATE, token: self.token)
+        @base_uri = format(URL_TEMPLATE, server: server, token: self.token)
       end
 
       def request(action, body = {})
diff --git a/spec/telegram/bot/client_spec.rb b/spec/telegram/bot/client_spec.rb
index 1b0ae06..5553a18 100644
--- a/spec/telegram/bot/client_spec.rb
+++ b/spec/telegram/bot/client_spec.rb
@@ -95,26 +95,45 @@ RSpec.describe Telegram::Bot::Client do
 
   describe '.new' do
     subject { described_class.new(*args) }
+    let(:token) { 'secret' }
+    let(:username) { 'superbot' }
 
     context 'when multiple args are given' do
-      let(:args) { %w[secret superbot] }
-      its(:token) { should eq args[0] }
-      its(:username) { should eq args[1] }
-      its(:base_uri) { should include args[0] }
+      let(:args) { [token, username] }
+      its(:token) { should eq token }
+      its(:username) { should eq username }
+      its(:base_uri) { should eq "#{described_class::SERVER}/bot#{token}/" }
     end
 
     context 'when hash is given' do
       let(:args) { [token: 'secret', username: 'superbot'] }
-      its(:token) { should eq args[0][:token] }
-      its(:username) { should eq args[0][:username] }
-      its(:base_uri) { should include args[0][:token] }
+      its(:token) { should eq token }
+      its(:username) { should eq username }
+      its(:base_uri) { should eq "#{described_class::SERVER}/bot#{token}/" }
+    end
+
+    context 'with custom server' do
+      let(:server) { 'http://my.server' }
+      let(:args) { [token, username, server: server] }
+      its(:base_uri) { should eq "#{server}/bot#{token}/" }
+
+      context 'and hash options' do
+        let(:args) { [token: token, username: username, server: server] }
+        its(:base_uri) { should eq "#{server}/bot#{token}/" }
+      end
     end
   end
 
   describe '#request' do
     subject { -> { instance.request(action, request_body) } }
     let(:action) { :some_action }
-    let(:url) { "#{format(described_class::URL_TEMPLATE, token: token)}#{action}" }
+    let(:url) do
+      base_uri = format(described_class::URL_TEMPLATE,
+        server: described_class::SERVER,
+        token: token,
+      )
+      "#{base_uri}#{action}"
+    end
     let(:request_body) { double(:body) }
     let(:prepared_body) { double(:prepared_body) }
     let(:response) { HTTP::Message.new_response(body).tap { |x| x.status = status } }