diff --git a/theorie-graphes/exercices/main.tex b/theorie-graphes/exercices/main.tex
index b5e6247..57c0254 100644
--- a/theorie-graphes/exercices/main.tex
+++ b/theorie-graphes/exercices/main.tex
@@ -5,9 +5,6 @@
 \date{Dernière compilation~: \today{} à \currenttime}
 
 \usepackage{styles}
-\usepackage{tikz}
-\usetikzlibrary{shapes.multipart}
-\usetikzlibrary{automata, arrows.meta, positioning}
 
 \begin{document}
 
diff --git a/theorie-graphes/exercices/styles.sty b/theorie-graphes/exercices/styles.sty
index fae81cd..918ccb0 100644
--- a/theorie-graphes/exercices/styles.sty
+++ b/theorie-graphes/exercices/styles.sty
@@ -85,6 +85,10 @@
 
 \usepackage{graphicx}
 
+\usepackage{tikz}
+\usetikzlibrary{shapes.multipart}
+\usetikzlibrary{automata, arrows.meta, positioning}
+
 \usepackage[hyphens]{url}
 \usepackage[colorlinks,hidelinks]{hyperref}
 
diff --git a/theorie-graphes/main.tex b/theorie-graphes/main.tex
index d77b515..3e78ff7 100644
--- a/theorie-graphes/main.tex
+++ b/theorie-graphes/main.tex
@@ -5,9 +5,6 @@
 \date{Dernière compilation~: \today{} à \currenttime}
 
 \usepackage{styles}
-\usepackage{tikz}
-\usetikzlibrary{shapes.multipart}
-\usetikzlibrary{automata, arrows.meta, positioning}
 
 \begin{document}
 
diff --git a/theorie-graphes/styles.sty b/theorie-graphes/styles.sty
index fae81cd..918ccb0 100644
--- a/theorie-graphes/styles.sty
+++ b/theorie-graphes/styles.sty
@@ -85,6 +85,10 @@
 
 \usepackage{graphicx}
 
+\usepackage{tikz}
+\usetikzlibrary{shapes.multipart}
+\usetikzlibrary{automata, arrows.meta, positioning}
+
 \usepackage[hyphens]{url}
 \usepackage[colorlinks,hidelinks]{hyperref}