diff --git a/lessons/tris/figures/stack_sort_expl.pdf b/lessons/tris/figures/stack_sort_expl.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..9f1aa3011f13939d66334e55e38b9bb77f0defb8
Binary files /dev/null and b/lessons/tris/figures/stack_sort_expl.pdf differ
diff --git a/lessons/tris/stack_sort.tex b/lessons/tris/stack_sort.tex
index 615ba40454fcc8f0210dacd22badbab025962a82..2949cd0f266d320f87a3d6d15b60e21f58c83b1e 100755
--- a/lessons/tris/stack_sort.tex
+++ b/lessons/tris/stack_sort.tex
@@ -1,8 +1,8 @@
-\documentclass[a4paper,11pt,dvips]{article}
-\usepackage{epsfig}
+\documentclass[a4paper,11pt]{article}
 \usepackage[T1]{fontenc}
 \usepackage[latin1]{inputenc}
 \usepackage{amsmath}
+\usepackage{graphicx}
 
 \pagestyle{myheadings}
 %\markright{Tri � deux piles}
@@ -86,7 +86,8 @@ tous les 
 \begin{center}
 \begin{figure}[ht]
 \begin{center}
-\epsfig{file=figures/stack_sort_expl.eps, width=12cm, height=9cm}
+% \epsfig{file=figures/stack_sort_expl.eps, width=12cm, height=9cm}
+\includegraphics{figures/stack_sort_expl.pdf}
 \end{center}
 \caption{Utilisation des deux piles pour le tri}
 \label{fig1}