diff --git a/include/level.hpp b/include/level.hpp
index 385f2f3..34b997d 100644
--- a/include/level.hpp
+++ b/include/level.hpp
@@ -49,12 +49,12 @@ public:
     /**
      * Récupère la liste des objets
      */
-    std::vector<ObjectPtr> getObjects();
+    std::vector<ObjectPtr>& getObjects();
 
     /**
      * Récupère la zone du niveau
      */
-    std::vector<std::pair<float, float>> getZone();
+    const std::vector<std::pair<float, float>>& getZone();
 };
 
 #endif
diff --git a/src/level.cpp b/src/level.cpp
index 5ce66b0..805f639 100644
--- a/src/level.cpp
+++ b/src/level.cpp
@@ -131,10 +131,10 @@ std::string Level::getName() {
     return name;
 }
 
-std::vector<ObjectPtr> Level::getObjects() {
+std::vector<ObjectPtr>& Level::getObjects() {
     return objects;
 }
 
-std::vector<std::pair<float, float>> Level::getZone() {
+const std::vector<std::pair<float, float>>& Level::getZone() {
     return zone;
 }