diff --git a/src/Life.java b/src/Life.java
index a7a55fd..341b6fd 100644
--- a/src/Life.java
+++ b/src/Life.java
@@ -53,6 +53,9 @@ public class Life implements ILife {
 
   @Override
   public void setDead(int x, int y) {
+    if (isInBounds(x, y)) {
+      grid[x][y] = false;
+    }
   }
 
   @Override