diff --git a/Gemfile b/Gemfile
index fa906bc..2a40aef 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,8 +5,8 @@ gem 'sidekiq-rate-limiter', '0.1.3', require: 'sidekiq-rate-limiter/server'
 gem 'telegram-bot-ruby', '>= 0.11', '< 1.0'
 gem 'slack-ruby-bot'
 gem 'celluloid-io'
-gem 'tdlib-ruby', git: 'https://github.com/southbridgeio/tdlib-ruby', tag: "v3.0.4"
-gem 'tdlib-schema', git: 'https://github.com/southbridgeio/tdlib-schema'
+gem 'tdlib-ruby', '~> 3.1.0'
+gem 'tdlib-schema', '~> 1.7.0'
 gem 'jwt'
 gem 'filelock'
 gem 'patron'
diff --git a/init.rb b/init.rb
index ba46847..c819588 100644
--- a/init.rb
+++ b/init.rb
@@ -29,7 +29,7 @@
   name 'Redmine Bots'
   url 'https://github.com/southbridgeio/redmine_bots'
   description 'This is a platform for building Redmine bots'
-  version '0.5.2'
+  version '0.5.7'
   author 'Southbridge'
   author_url 'https://github.com/southbridgeio'
 
diff --git a/lib/redmine_bots/telegram.rb b/lib/redmine_bots/telegram.rb
index 143dc7b..9a9dc55 100644
--- a/lib/redmine_bots/telegram.rb
+++ b/lib/redmine_bots/telegram.rb
@@ -36,7 +36,7 @@ def self.webhook_secret
   end
 
   def self.tdlib_client
-    settings = Setting.find_by_name(:plugin_redmine_bots).value
+    settings = Setting.find_by_name(:plugin_redmine_bots)&.value || {}
     TD::Api.set_log_file_path(Rails.root.join('log', 'redmine_bots', 'tdlib.log').to_s)
     config = {
       api_id: settings['telegram_api_id'],