diff --git a/lib/microsoft/graph.rb b/lib/microsoft/graph.rb
index 0686aaf..b337924 100644
--- a/lib/microsoft/graph.rb
+++ b/lib/microsoft/graph.rb
@@ -12,7 +12,9 @@ class Graph
     BODY_METHODS = %w[POST PUT PATCH].freeze
     ALLOWED_METHODS = [*BODY_METHODS, "GET", "DELETE"].freeze
 
-    def initialize(token: nil, error_handler: method(:error_handler), version: "1.0")
+    attr_reader :last_response
+
+    def initialize(token: nil, error_handler: method(:error_handler), version: "v1.0")
       @token = token
       @parser = URI::Parser.new
       @body_formatter = Microsoft::Graph::BodyFormatter.new
@@ -39,7 +41,7 @@ def call(endpoint, token: @token, method: "GET", headers: {}, params: nil, body:
       method = method.upcase
       raise ArgumentError, "`#{method}` is not a valid HTTP method." unless ALLOWED_METHODS.include?(method)
 
-      url = URI.join(GRAPH_HOST, @parser.escape("v#{@version}/#{endpoint.gsub(%r{^/}, "")}"))
+      url = URI.join(GRAPH_HOST, @parser.escape("#{@version}/#{endpoint.gsub(%r{^/}, "")}"))
       headers = headers.merge(
         Authorization: "Bearer #{token}",
         Accept: "application/json"
@@ -54,6 +56,7 @@ def call(endpoint, token: @token, method: "GET", headers: {}, params: nil, body:
         body: @body_formatter.call(body, method: method).to_json,
         parser: InstanceParser
       )
+      @last_response = response
 
       case response.code
       when 200...400