diff --git a/intro/ttnn.cls b/intro/ttnn.cls
index d497348..5187a30 100644
--- a/intro/ttnn.cls
+++ b/intro/ttnn.cls
@@ -18,6 +18,15 @@
 \ProvidesClass{ttnn}[2012/12/10 v1.3
  TTNN document class]
 % Derive de la classe article
+\DeclareOption {10pt}     {\PassOptionsToClass   {10pt}     {article}}
+\DeclareOption {11pt}     {\PassOptionsToClass   {11pt}     {article}}
+\DeclareOption {12pt}     {\PassOptionsToClass   {12pt}     {article}}
+\DeclareOption {draft}    {\PassOptionsToClass   {draft}    {article}}
+\DeclareOption {final}    {\PassOptionsToClass   {final}    {article}}
+\DeclareOption* {\OptionNotUsed} % don't forward unknown options
+
+\ProcessOptions
+
 \LoadClass{article}
 \RequirePackage{hyperref}
 %
@@ -92,7 +101,7 @@
 \fi
 %
 % Papier A4 + Marges
-\RequirePackage[paper=a4paper,top=2cm,bottom=3cm,left=2cm,right=2cm]{geometry}
+\RequirePackage[paper=a4paper,top=3cm,bottom=3cm,left=4cm,right=4cm]{geometry}
 %
 % liste des auteurs
 \RequirePackage{datatool}