diff --git a/README.md b/README.md
index 72150ff..0f94763 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ passed to it. If you wish to state that *mobile safari* is not supported, you
 can declare it like this:
 
     config.supported do |browser|
-      !(browser.name == "Safari" && browser.mobile?)
+      !(browser.name == "Safari" && browser.device.mobile?)
     end
 
 The block should return false to block the browser, true to allow it, and nil if it
@@ -62,7 +62,7 @@ cannot decide. This way you can make any arbitrary User-Agent explicitly allowed
 even if its version would have been blocked otherwise:
 
     config.supported do |browser|
-      true if browser.user_agent.include?('Linux')
+      true if browser.ua.include?('Linux')
     end
 
 Please note, that the order is important, thus the first block or requirement returning
diff --git a/browsernizer.gemspec b/browsernizer.gemspec
index e4f5153..36e7933 100644
--- a/browsernizer.gemspec
+++ b/browsernizer.gemspec
@@ -21,5 +21,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rake"
   s.add_development_dependency "rspec"
 
-  s.add_runtime_dependency "browser", "> 0.1.4"
+  s.add_runtime_dependency "browser", ">= 2.0", "< 3.0"
 end
diff --git a/lib/browsernizer/router.rb b/lib/browsernizer/router.rb
index bcbec10..9a427e7 100644
--- a/lib/browsernizer/router.rb
+++ b/lib/browsernizer/router.rb
@@ -47,7 +47,7 @@ def on_redirection_path?(env)
     end
 
     def get_browsers(env)
-      raw_browser = ::Browser.new :ua => env["HTTP_USER_AGENT"]
+      raw_browser = ::Browser.new env["HTTP_USER_AGENT"]
       browser = Browsernizer::Browser.new raw_browser.name.to_s, raw_browser.full_version.to_s
       [raw_browser, browser]
     end
diff --git a/spec/browsernizer/router_spec.rb b/spec/browsernizer/router_spec.rb
index 9cb6ad6..112585a 100644
--- a/spec/browsernizer/router_spec.rb
+++ b/spec/browsernizer/router_spec.rb
@@ -7,12 +7,12 @@
   subject do
     Browsernizer::Router.new(app) do |config|
       config.supported do |browser|
-        true if browser.user_agent.include?('Spec')
+        true if browser.ua.include?('Spec')
       end
       config.supported "Firefox", false
       config.supported "Chrome", "7.1"
       config.supported do |browser|
-        !(browser.safari? && browser.mobile?)
+        !(browser.safari? && browser.device.mobile?)
       end
     end
   end