1 files changed, 8 insertions, 8 deletions
diff --git a/src/model/MapData.ts b/src/model/MapData.ts
index dcb98b8..c8db35c 100644
--- a/src/model/MapData.ts
+++ b/src/model/MapData.ts
@@ -1,18 +1,18 @@
 import {mapFromObject} from '../util';
 
 interface Input {
-	tiles: {[key: string]: string};
-	collision: string[];
-	layers: string[][][];
+	readonly tiles: {[key: string]: string};
+	readonly collision: string[];
+	readonly layers: string[][][];
 }
 
 export default class MapData {
-	public tiles: Map<string, string>;
-	public collision: string[];
-	public layers: string[][][];
+	public readonly tiles: Map<string, string>;
+	public readonly collision: string[];
+	public readonly layers: string[][][];
 
-	public width: number;
-	public height: number;
+	public readonly width: number;
+	public readonly height: number;
 
 	constructor(data: Input) {
 		this.tiles = mapFromObject(data.tiles);