diff --git a/Gemfile.lock b/Gemfile.lock
index 68f972e..096655d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    codifligne (0.1.7)
+    codifligne (0.1.14)
       nokogiri (>= 1.8.5)
 
 GEM
diff --git a/lib/codifligne/common/operator.rb b/lib/codifligne/common/operator.rb
index 0d723ba..679b59b 100644
--- a/lib/codifligne/common/operator.rb
+++ b/lib/codifligne/common/operator.rb
@@ -3,8 +3,10 @@ class Operator < Base
     attr_accessor :name, :stif_id, :xml
 
     def lines
-      client = Codifligne::API.new
-      client.lines(operator_name: self.name)
+      @lines ||= begin
+        client = Codifligne::API.new
+        client.lines(operator_name: self.name)
+      end
     end
   end
 end
diff --git a/lib/codifligne/v2/api.rb b/lib/codifligne/v2/api.rb
index a0b7e4c..ac8a2b1 100644
--- a/lib/codifligne/v2/api.rb
+++ b/lib/codifligne/v2/api.rb
@@ -97,13 +97,23 @@ def parse_address(node)
       end
 
       def operators(params = {})
+        if params.empty?
+          # depending on the params, we may miss certain attributes on the lines
+          # so we only read them from the doc on the global endpoint 
+          lines_per_operator = Hash.new { |h, k| h[k] = [] }
+          lines(params).each do |line|
+            lines_per_operator[line.operator_ref] << line
+          end
+        else
+          lines_per_operator = {}
+        end
+
         get_doc(params).css('Operator').map do |operator|
           default_contact = parse_contact operator.css('ContactDetails').first
           private_contact = parse_contact operator.css('PrivateContactDetails').first
           customer_service_contact = parse_contact operator.css('CustomerServiceContactDetails').first
 
           address = parse_address operator.css('Address').first
-
           V2::Operator.new({
             name: operator.css('Name').first.content.strip,
             stif_id: operator.attribute('id').to_s.strip,
@@ -111,6 +121,7 @@ def operators(params = {})
             private_contact: private_contact,
             customer_service_contact: customer_service_contact,
             address: address,
+            lines: lines_per_operator[operator.attribute('id').to_s],
             xml: operator.to_xml })
         end.to_a
       end
diff --git a/lib/codifligne/version.rb b/lib/codifligne/version.rb
index 66f9484..a165106 100644
--- a/lib/codifligne/version.rb
+++ b/lib/codifligne/version.rb
@@ -1,3 +1,3 @@
 module Codifligne
-  VERSION = "0.1.13"
+  VERSION = "0.1.14"
 end
diff --git a/spec/codifligne/codifligne_v2_spec.rb b/spec/codifligne/codifligne_v2_spec.rb
index 1fb180c..577f6d9 100644
--- a/spec/codifligne/codifligne_v2_spec.rb
+++ b/spec/codifligne/codifligne_v2_spec.rb
@@ -141,4 +141,12 @@
     expect(operator.lines.count).to equal(403)
   end
 
+  it 'should retrieve lines from the doc when available' do
+    xml = File.new(fixture_path + '/v2/index.xml')
+    stub_request(:get, api_index_url).to_return(body: xml)
+
+    expect(client).to receive(:api_request).once.and_call_original
+    operator = client.operators.find { |o| o.name == 'RATP' }
+    expect(operator.lines.count).to equal(403)
+  end
 end