diff --git a/lib/napster/request.rb b/lib/napster/request.rb
index 050aec9..79610be 100644
--- a/lib/napster/request.rb
+++ b/lib/napster/request.rb
@@ -6,6 +6,9 @@ class Request
 
     attr_accessor :faraday
 
+    # Initialize a Faraday client
+    # @param options [Hash] May contains api_key, api_secret adn access_token
+    # @return [Faraday] Return Faraday object for making API calls
     def initialize(options)
       @faraday = Faraday.new(url: HOST_URL) do |faraday|
         faraday.request  :url_encoded
diff --git a/lib/napster/response_error.rb b/lib/napster/response_error.rb
index 5846519..aa3d329 100644
--- a/lib/napster/response_error.rb
+++ b/lib/napster/response_error.rb
@@ -5,6 +5,9 @@ class ResponseError < Faraday::Error
                   :response_body,
                   :faraday_response
 
+    # Initialize a Faraday client
+    # @param response [Faraday::Response] Should contain error response.
+    # @return [ResponseError] Return error object with info about the error.
     def initialize(response)
       @http_status = response.status
       @response_body = response.body