diff --git a/dungeonbattle/interfaces.py b/dungeonbattle/interfaces.py
index a1d4475..2e7add9 100644
--- a/dungeonbattle/interfaces.py
+++ b/dungeonbattle/interfaces.py
@@ -79,7 +79,7 @@ class Map:
         return Map(width, height, tiles, start_y, start_x)
 
     @staticmethod
-    def load_dungeon_from_string(content: str) -> "Map":
+    def load_dungeon_from_string(content: str) -> List[List["Tile"]]:
         """
         Transforms a string into the list of corresponding tiles
         """
@@ -121,7 +121,7 @@ class Map:
 
     def save_state(self) -> dict:
         """
-        Saves the map's attributes to a dictionnary
+        Saves the map's attributes to a dictionary
         """
         d = dict()
         d["width"] = self.width
@@ -137,7 +137,7 @@ class Map:
 
     def load_state(self, d: dict) -> None:
         """
-        Loads the map's attributes from a dictionnary
+        Loads the map's attributes from a dictionary
         """
         self.width = d["width"]
         self.height = d["height"]
@@ -145,7 +145,7 @@ class Map:
         self.start_x = d["start_x"]
         self.currentx = d["currentx"]
         self.currenty = d["currenty"]
-        self.map = self.load_dungeon_from_string(d["map"])
+        self.tiles = self.load_dungeon_from_string(d["map"])
         # add entities