diff --git a/lib/game_objects/entities/player.rb b/lib/game_objects/entities/player.rb
index b612fff..aed9ba5 100644
--- a/lib/game_objects/entities/player.rb
+++ b/lib/game_objects/entities/player.rb
@@ -134,7 +134,7 @@ class IMICFPS
     end
 
     def jump
-      if InputMapper.down?(:jump) && window.current_state.collision_manager.on_ground?(self)
+      if InputMapper.down?(:jump) && window.current_state.map.collision_manager.on_ground?(self)
         @velocity.y = 1.5
       end
     end
diff --git a/lib/map.rb b/lib/map.rb
index 7036cea..0eaf66f 100644
--- a/lib/map.rb
+++ b/lib/map.rb
@@ -3,6 +3,7 @@ class IMICFPS
     include EntityManager
     include LightManager
 
+    attr_reader :collision_manager
     attr_reader :gravity
     def initialize(map_loader:, gravity: IMICFPS::GRAVITY)
       @map_loader = map_loader