diff --git a/ICHLL_Brenon.md b/ICHLL_Brenon.md
index ec637bb4dc3f6017a510a86a15cee991e6332228..d86003b00e79dcd54d9b7703547fe040f5041953 100644
--- a/ICHLL_Brenon.md
+++ b/ICHLL_Brenon.md
@@ -6,7 +6,7 @@ institute:
     - Univ Lyon, INSA Lyon, CNRS, UCBL, LIRIS, UMR5205, F-69621
 numbersections: True
 documentclass: article
-classoptions:
+classoption:
 	- english
 	- a4paper
 	- 12pt
@@ -14,6 +14,8 @@ header-includes:
 	- \usepackage{times}
 	- \usepackage{textalpha}
 	- \usepackage{hyperref}
+	- \usepackage{geometry}
+	- \geometry{margin=25.4mm}
 	- \hypersetup{
             colorlinks,
             linkcolor = blue,