diff --git a/index.tex b/index.tex
index 8516d50..44bf720 100644
--- a/index.tex
+++ b/index.tex
@@ -48,11 +48,13 @@
 \usepackage{tikz}
 \usetikzlibrary{decorations}
 \usetikzlibrary{decorations.pathmorphing}
-\usetikzlibrary{shapes.geometric}
-\usetikzlibrary{calc}
-\usetikzlibrary{arrows}
-\usetikzlibrary{shapes.misc}
 \usetikzlibrary{decorations.pathreplacing}
+\usetikzlibrary{shapes.geometric}
+\usetikzlibrary{shapes.misc}
+\usetikzlibrary{arrows}
+\usetikzlibrary{calc}
+\usetikzlibrary{intersections}
+\usetikzlibrary{math}
 
 % Commandes Benoit
 \usepackage[nomessages]{fp}