diff --git a/lib/browsermob/proxy/client.rb b/lib/browsermob/proxy/client.rb
index 160880a..326ef1e 100644
--- a/lib/browsermob/proxy/client.rb
+++ b/lib/browsermob/proxy/client.rb
@@ -34,6 +34,7 @@ def initialize(resource, host, port)
       #   client.new_har("page-name", :capture_headers => true)
       #   client.new_har(:capture_headers => true)
       #   client.new_har(:capture_content => true)
+      #   client.new_har(:capture_cookies => true)
       #   client.new_har(:capture_binary_content => true)
       #
 
@@ -47,6 +48,7 @@ def new_har(ref = nil, opts = {})
 
         params[:initialPageRef] = ref if ref
         params[:captureHeaders] = true if opts[:capture_headers]
+        params[:captureCookies] = true if opts[:capture_cookies]
         params[:captureContent] = true if opts[:capture_content]
 
         if opts[:capture_binary_content]