diff --git a/src/main/java/cz/jzitnik/game/Game.java b/src/main/java/cz/jzitnik/game/Game.java
index 6daa649..ccf6288 100644
--- a/src/main/java/cz/jzitnik/game/Game.java
+++ b/src/main/java/cz/jzitnik/game/Game.java
@@ -32,7 +32,7 @@ public class Game implements Serializable {
     @SuppressWarnings("unchecked")
     private final List<Block>[][] world = (List<Block>[][]) new CopyOnWriteArrayList[256][512];
     private final Player player = new Player();
-    private boolean mining = false;
+    private transient boolean mining = false;
     @Setter
     private Window window = Window.WORLD;
     private final Inventory inventory = new Inventory();
@@ -47,6 +47,7 @@ public class Game implements Serializable {
 
         entitySpawnProvider = new EntitySpawnProvider();
         gameStates = new GameStates(this);
+        mining = false;
     }
 
     public Game() {