1 files changed, 4 insertions, 2 deletions

diff --git a/src/ch/epfl/xblast/server/Board.java b/src/ch/epfl/xblast/server/Board.java
index f2a3c89..d7ca706 100644
--- a/src/ch/epfl/xblast/server/Board.java
+++ b/src/ch/epfl/xblast/server/Board.java
@@ -5,6 +5,7 @@ import ch.epfl.xblast.Cell;
 import ch.epfl.xblast.Lists;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 /**
@@ -55,7 +56,7 @@ public final class Board {
         if (blocks == null || blocks.size() != BLOCKS_LIST_SIZE)
             throw new IllegalArgumentException();
 
-        this.blocks = blocks;
+        this.blocks = new ArrayList<>(blocks);
     }
 
     /**
@@ -148,6 +149,7 @@ public final class Board {
      * @return a list of the Sequences of blocks of the board.
      */
     public List<Sq<Block>> getBlocks() {
-        return blocks;
+        List<Sq<Block>> immutableBlocks = Collections.unmodifiableList(new ArrayList<>(blocks));
+        return immutableBlocks;
     }
 }