diff --git a/include/gui/modal.hpp b/include/gui/modal.hpp
index 7f38df4..8a6ac0e 100644
--- a/include/gui/modal.hpp
+++ b/include/gui/modal.hpp
@@ -6,13 +6,11 @@
 #include <functional>
 
 /**
- * Classe de base pour les fenêtres modales
- * qui bloquent l'accès aux autres éléments du jeu
+ * Classe pour les dialogues d'information du jeu
  */
 class Modal {
 protected:
-    sfg::Window::Ptr modal_main_window;
-    sfg::Window::Ptr modal_inner_window;
+    sfg::Window::Ptr modal_window;
 
     sfg::Box::Ptr layout_box;
     sfg::Box::Ptr buttons_box;
diff --git a/res/gui.theme b/res/gui.theme
index 935057f..7386ab4 100644
--- a/res/gui.theme
+++ b/res/gui.theme
@@ -23,10 +23,6 @@ Window {
 }
 
 Window.modal {
-    BackgroundColor: #00000000;
-}
-
-Window.modal Window {
     Gap: 20;
 }
 
diff --git a/src/gui/modal.cpp b/src/gui/modal.cpp
index 1465fdb..6549645 100644
--- a/src/gui/modal.cpp
+++ b/src/gui/modal.cpp
@@ -3,10 +3,8 @@
 
 Modal::Modal() {
     // création des fenêtres
-    modal_main_window = sfg::Window::Create(sfg::Window::Style::BACKGROUND);
-    modal_inner_window = sfg::Window::Create(sfg::Window::Style::BACKGROUND);
-
-    modal_main_window->SetClass("modal");
+    modal_window = sfg::Window::Create(sfg::Window::Style::BACKGROUND);
+    modal_window->SetClass("modal");
 
     // la fenêtre interne est alignée au centre de la principale
     sfg::Alignment::Ptr inner_alignment = sfg::Alignment::Create();
@@ -27,14 +25,11 @@ Modal::Modal() {
     layout_box->PackEnd(subtitle_label);
     layout_box->PackEnd(spacer);
     layout_box->PackEnd(buttons_box);
-    modal_inner_window->Add(layout_box);
-
-    inner_alignment->Add(modal_inner_window);
-    modal_main_window->Add(inner_alignment);
+    modal_window->Add(layout_box);
 }
 
 sfg::Window::Ptr Modal::getWindow() {
-    return modal_main_window;
+    return modal_window;
 }
 
 sfg::Box::Ptr Modal::getLayoutBox() {
@@ -62,7 +57,8 @@ void Modal::setSubtitle(sf::String label) {
 }
 
 void Modal::resize(sf::Vector2u size) {
-    modal_main_window->SetAllocation(sf::FloatRect(
-        0, 0, size.x, size.y
+    modal_window->SetAllocation(sf::FloatRect(
+        (sf::Vector2f) size / 2.f - modal_window->GetRequisition() / 2.f,
+        modal_window->GetRequisition() / 2.f
     ));
 }