diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a509e16..d08a30b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -21,6 +21,6 @@ linters:
   stage: quality-assurance
   image: python:3-alpine
   before_script:
-    - pip instal tox
+    - pip install tox
   script: tox -e linters
   allow_failure: true
diff --git a/dungeonbattle/interfaces.py b/dungeonbattle/interfaces.py
index 03550d1..1674427 100644
--- a/dungeonbattle/interfaces.py
+++ b/dungeonbattle/interfaces.py
@@ -11,17 +11,19 @@ class Map:
         self.tiles = tiles
 
     @staticmethod
-    def load(filename):
+    def load(filename: str):
         with open(filename, "r") as f:
             file = f.read()
         return Map.load_from_string(file)
 
     @staticmethod
-    def load_from_string(content):
+    def load_from_string(content: str):
         lines = content.split("\n")
+        lines = [line for line in lines if line]
         height = len(lines)
-        width = len(lines[0]) - 1
-        chars = [[Tile.from_char(c, x, y) for x, c in enumerate(line)] for y, line in enumerate(lines)]
+        width = len(lines[0])
+        chars = [[Tile.from_char(c, x, y)
+                  for x, c in enumerate(line)] for y, line in enumerate(lines)]
         return Map(width, height, chars)
 
 
@@ -42,6 +44,6 @@ class Tile:
 class Entity:
     tile: Tile
 
-    def move(self, x, y):
+    def move(self, x: int, y: int) -> None:
         self.tile.x = x
         self.tile.y = y
diff --git a/dungeonbattle/interfaces_test.py b/dungeonbattle/interfaces_test.py
index 35fffe0..a987b37 100644
--- a/dungeonbattle/interfaces_test.py
+++ b/dungeonbattle/interfaces_test.py
@@ -4,7 +4,7 @@ from dungeonbattle.interfaces import Map
 
 
 class TestInterfaces(unittest.TestCase):
-    def test_map(self):
+    def test_map(self) -> None:
         m = Map.load_from_string("ab\ncd\n")
         self.assertEqual(m.width, 2)
         self.assertEqual(m.height, 2)
diff --git a/tox.ini b/tox.ini
index 72c18d6..098a080 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,7 +27,7 @@ commands =
     flake8 main.py dungeonbattle
 
 [flake8]
-ignore = W503 ANN002 ANN03 ANN101 ANN102 ANN204
+ignore = W503 ANN002 ANN003 ANN101 ANN102 ANN204 ANN205
 exclude =
     .tox,
     .git,